scientists have resolved the problem of shocking in an airpl
![](images/u2507.png)
scientists have resolved the problem of shocking in an airplane's wings based on a dragonfly.5053
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hu605075 共回答了22个问题
|采纳率95.5%- 科学家从蜻蜓上得到启发,解决了飞机翅膀震动的问题.
- 1年前
芊芊绿叶 共回答了536个问题
|采纳率- 科学家们已经解决了在飞机的令人震惊的基于蜻蜓的机翼问题
- 1年前
jack119white 共回答了2个问题
|采纳率- 科学家已经找到解决飞机翅膀震动的原因,基于gragonfly.5053
- 1年前
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- 在线等!求大神给翻译一下!The scientists observed many supernovae at diff
在线等!求大神给翻译一下!
The scientists observed many supernovae at different distances to determine how fast they are speeding away from us. (They measured the objects’ red-shift, or how much their light had been changed due to the Doppler Effect, which is the compression or expansion of waves that occurs when an object is moving toward or away from you. An analogy is the siren of an ambulance that changes pitch as it moves toward you, then passes you and heads the other way — its waves are first compressed, then stretched.) These measurements gave astronomers a picture of how fast the universe was expanding at different points in its history.荷塘月色1年前2
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云前 共回答了20个问题
|采纳率95%科学家们观测到的超新星在不同距离来确定多快离我们远去.(他们测量对象的红移,或有多少他们的光被改变了由于多普勒效应,即压缩或膨胀波的发生在一个对象正朝着或远离你.类比是救护车的警笛声,改变音高,走向你,然后通...1年前查看全部
- 翻译 1.一些科学家已经使机器人行走和跳舞了. some scientists .
翻译 1.一些科学家已经使机器人行走和跳舞了. some scientists .
翻译
1.一些科学家已经使机器人行走和跳舞了.
some scientists . . …………robots.and.
真不要脸啊这人1年前1
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落雨哉 共回答了16个问题
|采纳率93.8%Some scientists have already made robots walk and dance
!我真的很需要,1年前查看全部
- 汉语译成英语--i hear some scientists are afraid that computers wil
汉语译成英语
--i hear some scientists are afraid that computers will take the place of man,having humans as their slaves.
__what if that is the case.柯大1年前3
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nnngggg 共回答了19个问题
|采纳率94.7%我听说有科学家担心计算机将会取代人类,并使人类成为它的奴隶
如果那样将会出现什么情况呢?1年前查看全部
- Scientists in the United States have developed a method that
Scientists in the United States have developed a method that may help to predict earthquakes earlier.They say it could give people who live in deadly earthquake areas enough warning to leave before an earthquake hits.
Currently,the most modern systems for predicting earthquakes find them only a short time before the event.Like most strong earthquakes,the one that hit southwestern China in May was not identified early enough for people to flee the area.That earthquake killed sixty-nine thousand people.
But scientists who study earthquakes are reporting that new technology could measure very small changes in the Earth's surface.Their report was published this month in Nature magazine.Fenglin Niu is a seismologist(地震学家)with Rice University in Houston,Texas.He and his team performed experiments along California's San Andreas Fault(断层),an area famous for its many earthquakes.
The team placed highly sensitive electrical devices about one kilometer below ground in two different places.The devices were able to measure even small changes in air pressure on the Earth's surface.The scientists say such changes are caused when rocks push together,forcing air out of small cracks in the rock.When this happens,seismic(地震的)waves travel faster than usual through the rock.(203 words)
1、The Nature magazine is about_________?
A、science
B、earthquake
C、novel
D、people
2、What is NOT true about the experiments done by Fenglin Niu and his team?
A、Some electrical devices were placed below ground in two different places.
B、The electrical devices can measure changes in air pressure on the Earth's surface.
C、The experiments were carried out along California's San Andreas Fault.
D、The experiments forced air out of small cracks in the rock.ll王归来91年前4
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sozn 共回答了16个问题
|采纳率81.3%1)A
原文:But scientists who study earthquakes are reporting that new technology could measure very small changes in the Earth's surface.Their report was published this month in Nature magazine.
首先本文说的是地震,所以c和d并不符合文章中心.而且和地震有关的科学报道不会发表到小说或者人文杂志中.其次,这句话的重点在于scientist而不是earthquake.并且关于地震的专门杂志并不符合常理.而且这个杂志起名为nature magazine,nature在这里是指自然,和科学是相辅相成的.所以选a
2)D
a b c在原文中都有提到.和d有关的原文是这样的:The scientists say such changes are caused when rocks push together,forcing air out of small cracks in the rock.意思是气压变化是由于岩石震动导致空气从小缝隙中溢出,而不是如d所说空气从小缝隙中溢出是由于这个实验.1年前查看全部
- 1.The scientists and technicians overcame a lot of difficult
1.The scientists and technicians overcame a lot of difficulties __ the personal computer.
A.they had developing B.having developing
C.they had developed D.which has to develop
2.Alf used to get __ he gets now.
A.five times the money B.as much five times money as
C.twice the money as much as
D.twice as much as the money
3.I can't think of many cases __ students obviously knew a lot of English words and expressions to write a good essay.
A.why B.which C.as D.where
4.This is the question __.
A.that we've had so much discussion
B.we've discussed about
C.we've had so much discussion about
D.of which we've discussed
5.The curous boy didn't believe the fact__.
A.most of us thought to be true
B.that most of us thought it were to be true
C.what most of us thought was true
D.as most of us thought true
6.Never give him more money than __.
A,being necessary B.is necessary
C.it is necessary D.what necessary
7.We have to consider __ to do in situations __ there are many people involved.
A.how,when B.what,when C.how,where D.what,where
8.It is in the very factory __ we worked last year that we will work for two weeks next month.
A.that B.where C.which D.when
9.Fewer people __ we had expected were present at that meeting.
A.whom B.who C.that D.than
10.He found no way __ I think is of great value to the study of science.
A.that B.in which C.which D./
(PS:1.上十题答案分别为:1 5 A A D C A
6 10 B D B D A
2.答案论的同学请不必参与回答
3.再次对参与讲解的大虾表示感谢,希望能耐心详细的讲解上述习题)摸鸡头1年前3
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行进人 共回答了24个问题
|采纳率95.8%先讲讲定于从句 定语从句是由关系代词和关系副词引导的从句,其作用是作定语修饰主句的某个成分,定语从句分为限定性和非限定性从句两种
一、 限定性定语从句
1.that即可代表事物也可代表人,which代表事物;它们在从句中作主语或宾语,that在从句中作宾语时常可省略关系词,which在从句中作宾语则不能省略.而且,如果which在从句中作“不及物动词+介词”的介词的宾语,注意介词不要丢掉,而且介词总是放在关系代词which的前边,但有的则放在它原来的位置
2.which的用法.代表物时多用which.作宾语时,根据先行词与定语从句之间的语义关系,先行词与which之间的介词不能丢
eg.the factory in which I worked last year(在句中介词后只用which不用that)或the factory which/that I worked in last year.在句中
3.that地用法.在带有下列词的句子中用that不用which,这些词包括all,anything,much,等,这时的that常被省略.如果先行词被very,only,最高级或序数词修饰也需要用that.还有当先行词有人有物时用that
4.who和whom引导的从句用来修饰人,分别作从句中的主语和宾语,whom作宾语时,要注意它可以作动词的宾语也可以作介词的宾语
5.where是关系副词,用来表示地点的定语从句相当于 介词+which
6.when引导定语从句表示时间
注〕值得一提的是,表示时间“time"一词的定语从句只用when引导,有时不用任何关系代词,当然也不用that引导
By the time you arrive in London,we will have stayed there for two weeks.
I still remember the first time I met her.
7.whose是关系代词,修饰名词作定语,相当于所修饰成分的前置所有格
二、非限定性定语从句:非限定性定语从句的作用是对所修饰的成分作进一步说明,通常和主句间用逗号隔开,将从句拿掉后其他部分仍可成立
1.which引导的非限定性定语从句来说明前面整个句子的情况或主句的某一部分
2.有时as也可用作关系代词
3.在非限定性定语从句中,不能用that,而用who,whom代表人,用which代表事物
三、定语从句结构错误
1.缺关系词
2.从句中缺成分
下面看看题
1 定语从句是they had修饰 difficulties.have difficulties doing sth 是词组.
2.考的主要是同级比较
1)倍数+as+形容词/副词/(名词)+as
句子应为twice as much money as
2)倍数+名词 所以B选项正确
five times the money
3.根据题意 where 相当于in which
4.由于介词不能省略,所以在B,C中选.我觉德2个都可以.
5.定语从句不用what引导,排除c.原句应为 most of us thought it to be true 动词不定式做宾补.所以排除B,D.
6.不知道
7.what 常用what to do后不需接宾语,而how 通常是 how to do sth 后需接宾语.排除a,c.而the situations表示场合而非时间所以用where
8.本句主句是it is .that 强调句.意思是“这正是”.we worked last year是定语从句修饰factory.work 是不及物动词,所以后要接介词.应该是the factory (thatwhich)we worked in last year 或the factory in which we worked in last year.句中介词被省略,故用where 代替in which
9.fewer...than
10.先行词前有形容词最高级、序数词或only,very,none,no,little,few,much等修饰时定语从句用that引导
累死了1年前查看全部
- French doctors and American scientists have reported doing a
French doctors and American scientists have reported doing an operation in which the doctor was out
王子的戒指丢了1年前1
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x08302 共回答了16个问题
|采纳率87.5%法国医生和美国科学家已提出执行一项行动,但此医生被排除在行动之外.
如果有上下文的话,会更准确一些.这句话信息完整性本身不是很好.1年前查看全部
- The scientists were waiting to see the problem ___
The scientists were waiting to see the problem ___
A.settled
B.to be settled
Why is B.Isn't it "see sth.done"?wetnight1年前1
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高飞了 共回答了15个问题
|采纳率93.3%此为被动语态应用to be done1年前查看全部
- 初二下英语完形填空we live in computer age.people ( ) scientists,teach
初二下英语完形填空
we live in computer age.people ( ) scientists,teachers,writers and even students use computer to do all kinds of work.but more than 30 years ago ,( ) could not do much .they were ery big and expensive.very ( )people were interested in them and knew how to use them.today computers are smaller and ( ).but they can d a lot of work ; many people like to use them .some peple ( )have them at home.
company become very imprtant because they can work ( )than people and make fewer mistakes.computer can( ) people do a lot of work.writers now use computers to ( ) .teachers use them to help teaching .students use them to ( ).computers can als remember what you ( )them.computers are vrey useful and helpful .they are our friends.do you want to have a cmputer?衬衣领子1年前1
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waqcjy 共回答了26个问题
|采纳率92.3%we live in computer age.people (like ) scientists, teachers, writers and even students use computer to do all kinds of work.but more than 30 years ago ,( they ) could not do much . they were ery big and expensive. very (few )people were interested in them and knew how to use them. today computers are smaller and ( portable ).but they can d a lot of work ; many people like to use them . some peple ( even )have them at home.
company become very imprtant because they can work ( harder )than people and make fewer mistakes. computer can( help ) people do a lot of work. writers now use computers to ( write) .teachers use them to help teaching . students use them to (study ). computers can als remember what you ( store )them. computers are vrey useful and helpful .they are our friends. do you want to have a cmputer?1年前查看全部
- Scientists at Harvard University and Bates College find fema
Scientists at Harvard University and Bates College find female chimpanzees (黑猩猩) appear to treat sticks as dolls, carrying them around until they have children of their own. Young males engage in such behavior much less frequently.
The new work by Sonya M. Kahlenberg and Richard W. Wrangham, described this week in the journal Current Biology, provides the first evidence of a wild nonhuman species playing with dolls, as well as the first known sex difference in a wild animal’s choice of playthings.
The two researchers say their work adds to a growing body of evidence that human children are probably born with their own ideas of how they want to behave, rather than simply mirroring other girls who play with dolls and boys who play with trucks. Doll play among humans could have its origins in object—carrying by earlier apes (猿类), they say, suggesting that toy selection is probably not due entirely to socialization.
“In humans, there are obvious sex differences in children’s toy play, and these are remarkably similar across cultures,” says Kahlenberg. “While socialization by elders and peers has been the primary explanation, our work suggests that biology may also have an important role to play in activity preferences.”
In 14 years of data on chimpanzee behavior at the Kibale National Park in Uganda, Kahlenberg and Wrangham counted more than 100 examples of stickcarrying. Some young chimpanzees carried sticks into the nest to sleep with them and on one occasion built a separate nest for the stick. “We have seen juveniles occasionally carrying sticks for many years, and because they sometimes treated them rather like dolls, we wanted to know if in general this behavior tended to represent something like playing with dolls,” says Wrangham, a Professor at Harvard. “If the doll hypothesis (假设) was right, we thought that females should carry sticks more than males do, and that the chimpanzees should stop carrying sticks when they had their first child. We have now watched enough young chimpanzees to prove both points.”
小题1:What does a female chimpanzee do with sticks?A.She gives them to her child to play with. B.She treats them as dolls. C.She makes useful tools from them. D.She treats them as weapons. A.Sex difference. B.Socialization. C.Environment. D.Cultural difference. A.socialization has nothing to do with human’s choice of playthings B.sex difference is the only factor in human’s choice of playthings C.the biology factor may also influence toy choice D.people choose different toys in different cultures A.both humans and chimpanzees choose their playthings due to sex difference B.different factors cause humans and chimpanzees to choose different playthings C.only female chimpanzees have playthings D.chimpanzees usually choose playthings for their children Rexy1年前1
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cdy071200 共回答了21个问题
|采纳率100%小题1:B
小题2:A
小题3:C
小题4:A
文章介绍了再选择玩具方面猩猩和人有很多相似之处。
小题1:细节题。根据第一段第2行treat sticks as dolls。
小题2:细节题。根据第二段最后一句as well as the first known sex difference in a wild animal’s choice of playthings.可知性别差异是选择玩具的一个原因。
小题3:细节题。根据第四段最后一句our work suggests that biology may also have an important role to play in activity preferences.可知C正确。
小题4:推断题。根据文章特别的3,4段可知人类和动物在选择玩具方面都受到性别差异的影响。1年前查看全部
- Can animals be made to work for us?Some scientists think tha
Can animals be made to work for us?Some scientists think that one day animals
may be taught to do a number of simple jobs.They say that in a film or on TV
we may see elephants,or monkeys,dogs,bear,or other animals doing a lot of
things.If you watch carefully,you may find that those animals are always given
something to eat in return for doing them.The scientists say that many different
animals may be taught to do a number of simple jobs if they know they will get
something to eat in return.
Of course,as we know,dogs can be used to guard a house,and elephant can
be used to do some heavy jobs.And we can also teach animal to work in factories.
Apes(猿猴),for example,have been used in America to help make cars and scientists
believe that these large monkeys may one day get in crops and even drive trains.
36.Elephant can be used to do some heavy jobs because ____.
A.they can eat a lot
B.they are very heavy,too
C.they are very strong
37.Dogs can be used to guard a house for his host because ____.
A.they are good at running
B.they are very kind and friendly to people
C.they are brave enough to get the stranger(陌生人)and thieves away from the house
38.Many different animals may be taught to do some simple jobs if ____.
A.they have enough food to eat
B.they learn they will get something to eat in return after doing them
C.if they are sent to school
39.____ can be train to work for us.
A.Only a few animals
B.Quite a few animals
C.Few animal不想赖着你1年前1
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k1558 共回答了16个问题
|采纳率100%Can animals be made to work for us?
动物能对为我们工作吗?
Some scientists think that one day animals may be taught to do a number of simple jobs.
部分科学家们认为动物可以被教会做一些简单的工作.
They say that in a film or on TV we may see elephants,or monkeys,dogs,bear,or other animals doing a lot of things.
他们说在电影或电视中我们可以看到大象,猴子,狗或、熊、或其他动物做很多事情.
If you watch carefully,you may find that those animals are always given something to eat in return for doing them.
如果你仔细观察,你会发现那些动物总是被赏给一些吃的东西做为工作的回报.
The scientists say that many different animals may be taught to do a number of simple jobs if they know they will get something to eat in return.
科学家们说,许多不同的动物可以被教会做一些简单的工作,如果他们知道他们会得到一些吃的东西作为奖赏.
Of course,as we know,dogs can be used to guard a house,and elephant can be used to do some heavy jobs.
当然,我们都知道,狗可以用来守卫一所房子,大象可以用来做一些很重的工作.
And we can also teach animal to work in factories.
我们还可以教动物在工厂工作.
Apes,for example,have been used in America to help make cars and scientists believe that these large monkeys may one day get in crops and even drive trains.
猿猴,举例来说,在美国已经被使用用来帮助制造汽车,科学家认为这些大猴子总有一天可以种庄稼、甚至开车.
36、C.they are very strong
37、C.they are brave enough to get the stranger(陌生人)and thieves away from the house
38、B.they learn they will get something to eat in return after doing them
39、C.Few animal1年前查看全部
- 词性转换scientists can hardly give scientific __(explain)on how
词性转换scientists can hardly give scientific __(explain)on how terrs communicate wieh each other
最好能说一下原因lilg001年前1
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meetyouaaa 共回答了22个问题
|采纳率95.5%explanations
scientific 科学的...形容词,修饰名词,所以explain变名词1年前查看全部
- Scientists are doing research to better understand the habit
Scientists are doing research to better understand the habits of pandas.里面所有的知识点
游历四方1年前0
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共回答了个问题
|采纳率
- 他至少写了六本书He _ _ _ six books科学家们正尽力使机器人看起来像人类scientists are no
他至少写了六本书
He _ _ _ six books
科学家们正尽力使机器人看起来像人类
scientists are now _ _ _ robots look like people
根据首字母提示补全对话
A:can you _ the future?
B:well,it can be difficult a_ w_ a_ embarrassing
A:why?
B:because there were many famous _ that never came t_
上面的题是关于预言的
Ask╆ForMore
能给我解释你那答案加上B说的 it can be difficult as well as embarrassinglongbye1年前1
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酒醉因酒浓 共回答了22个问题
|采纳率77.3%1.wrote at least
2.trying to make
A:predict
B:as well as(应该就是它了)
预言很难也是一件尴尬的事情,因为有很多著名的预言都不是准确的.
B:predictions,true1年前查看全部
- 求一句话的英译汉,According to the new school of scientists,technolog
求一句话的英译汉,
According to the new school of scientists,technology is an overlooked force in expanding the horizons of scientific knowledge.yixiaoyingtian1年前4
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sept09 共回答了15个问题
|采纳率100%根据新的科学流派的说法,在扩宽科学知识的视野方面,工艺学是一项被忽视的因素1年前查看全部
- 1.Some scientists believe that the left side of the human br
1.Some scientists believe that the left side of the human brain is responsible for logic.(改为以 it 作形式主语开头的句型)
2.The manager talked to Sam for three hours yesterday morning.(改为以 spend… doing为句型的句子 )
3.If we know more about the workings of the brain,we’ll be able to put it to better use.(改为以“The+比较级……,the+ 比较级……” 句型的句子)
4.The Wangs settled down in this country about four and a half years ago.(用It has been… since…结构改写)
5.The boy never remembered to do his homework until bedtime.(改为以Not until位于句首的句型)
1.If we know more about the workings of the brain,we’ll be able to put it to better use.(改为以“The+比较级……,the+ 比较级……” 句型的句子)
2.The Wangs settled down in this country about four and a half years ago.(用It has been… since…结构改写)
3.If we know more about the workings of the brain,we’ll be able to put it to better use.(改为以“The+比较级……,the+ 比较级……” 句型的句子)
4.The Wangs settled down in this country about four and a half years ago.(用It has been… since…结构改写)nancy83tan1年前1
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隔岸听萧 共回答了9个问题
|采纳率100%1 It is believed that the left side of the human brain is responsible for logic
2 The manager spent three hours in talking to Sam for yesterday morning
3 the more we know about the workings of the brain,the bettet we’ll be able to put it to use
4 it has been about four and a half years since the Wangs settled down in this country
5 The boy didn't remember to do his homework until bedtime
下面四个句子不是重复的嘛?看上面哈1年前查看全部
- 例句:Scientists are interested in devices that give promise of
例句:Scientists are interested in devices that give promise of more precise timekeeping.
请问give promisejj番茄1年前4
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冰冷江湖 共回答了21个问题
|采纳率76.2%give promise
有前途,有希望.保证 答应
I won`t give up on this PROMISE:我也不会放弃这一承诺
Clouds give promise of rain.
例句
'阴云'.''预示着雨的来临.
Clouds give promise of rain.
阴云预示着雨的来临.
Also give me your promise,please.
也请给我一个承诺!
Thank you my lover give me a promise !!!
谢谢爱人给的承诺!
As God is my witness ,I give you my promise.
正如上帝是我的见证,我给你我的诺言.1年前查看全部
- Scientists are trying to develop a special material, _______
Scientists are trying to develop a special material, _______ they will make use of in space.
A.that B.what C.it D.one xs_fjp1年前1
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混小子13 共回答了14个问题
|采纳率92.9%D
1年前查看全部
- many scientists fail to recognize that the environment an in
many scientists fail to recognize that the environment an individual grows up in plays a much more pivotal role in the molding or undoing of one's behavioral tendency.这个that是个宾语从句.句意为.许多科学家没能够认识到环境在个人的成长中扮演了非常关键的角色在形成个人行为趋势时.想问的是that后面为什么没有按照正常语序来表达.而是把从句的宾语提前放在从句主语an individual 前呢
晓梦香寒1年前1
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谭乔 共回答了20个问题
|采纳率100%many scientists fail to recognize that the environment an individual grows up in plays a much more pivotal role in the molding or undoing of one's behavioral tendency.
1. 由于没有充分理解整个句子法人结构,翻译很拗口,倒像是外国人说汉语.应该翻译为:在个人行为倾向的塑造和复原过程中,许多科学家没能够认识到个人成长的环境扮演着尤为关键的角色.
2. That 后面并非不是正常语序,而是你没有搞清楚句子的结构.其结构应该如下:
主句——the environment plays a much more pivotal role in the molding or undoing of one's behavioral tendency
定语从句——an individual grows up in,其中由于关系代词 which/that 是介词 in 的宾语而被省略.1年前查看全部
- 英语翻译Scientists are using women to learn what's being happeni
英语翻译
Scientists are using women to learn what's being happening on the sun's surface for the last ten thousand years.
有句子中be+being+doing这种语法吗,酒鬼食神1年前3
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fzsy0876 共回答了9个问题
|采纳率88.9%没有这种用法,这句子里的 happening是名词 ,事件;意外发生的事
不是happen的现在分词
,尽管happen的现在分词和它一样,都是happening.1年前查看全部
- Space and oceans are the new world which scientists(try) ___
Space and oceans are the new world which scientists(try) ____________to explore.
are trying ..句子中看不出时态..为什么不能用trying直接表示主动...qq色天香11年前2
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郁闷的鸡咯咯 共回答了20个问题
|采纳率95%which引导的从句必须是一个完整的句子,"trying"不是位于动词,直接用的话句子就不完整了1年前查看全部
- as 和like的区别people__ scientists,teachers,writers and even stu
as 和like的区别
people__ scientists,teachers,writers and even students use computers to do all kinds of work.
答案是like,为什么as不行呢?填such as可以吗?hohoapple1年前1
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终于要组合了 共回答了19个问题
|采纳率89.5%这里可以用翻译法写 LIKE有类似 诸如的意思 而AS没有 你翻翻辞典 看它们的意思就行1年前查看全部
- Some scientists think fighting ( )the animals is the main ca
Some scientists think fighting ( )the animals is the main cause for the dinosaurs' extinction .
Some scientists think fighting ( )the animals is the main cause for the dinosaurs' extinction .
A.in B.among C.between D.of136682525851年前2
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落寞有时欢有时 共回答了15个问题
|采纳率93.3%B among
有些科学家们认为,在动物之间的斗争,才是恐龙消失的主要原因.
祝好!1年前查看全部
大家在问
- 1八上:积的乘方计算题,1.[(x-y^3]^4*[-(y-x)^2]^5*(x-y)2.(-2x^2y)^3-8(x^2
- 2子类是父类的子集吗?
- 3象形,指事,会意,形声,转注,假借,用哪种方法造出的字最多!
- 4写出与下列句子有关的成语.1.俗话说:“家有敝帚,享之千金.”2.万物并育而不加害,道并行而不相悖.3.我劝天公重抖擞,
- 5碱性条件下:Na+,CO3 2-,K+,ClO-,SO42-共存吗?
- 6we can do it!这句话可分解为哪些意义呢?
- 7一副地图上,1cm表示实际距离的2千米,这幅地图的比例尺是( )
- 8初中复习与能力训练化学综合评估六答案答案 (选择题不用了)
- 9下面这句话中哪个单词有缩略形式啊
- 10分离泥和水、泥和食盐固体、汽油和水、水和乙醇、Nacl晶体和硝酸钾晶体的过程和仪器.
- 11现在有86个乒乓球,12个乒乓球盒,如果把这些乒乓球全部放在几个乒乓球盒,每个盒子里最多放8个乒乓球,不许有空盒,那么至
- 12小明和小红同时从甲地到乙地,小明到达乙地后立即返回,在丙处与小红相遇这时小红行了20分钟
- 13有一个分数,将它的分母减去2,得到三分之二,将它的分母加上5,就得到八分之三,求原分数.
- 14写一篇以幸福为话题的作文.是自己写的,不是摘抄的,从别的地方复制粘贴过来的,写的好的会给很多分,急要.
- 1548%x减去12%x等于36 列式