第19页的实验物体发出声音的音调与什么有关,什么越高,发声体的什么越高.

每千克苹果2.5元,每千克梨3元

凤仙花 自身喷射

4 15
隔一个看,奇数个一排偶数隔一排

Stop Smoking Now—We Can Help!
In almost every US city and town,there are local organisations to help people stop smoking.Participants learn to recognise smoking triggers (things that start them smoking) and they try to set a date in the future when they will stop smoking.
One of the most popular and successful is the California Smokers' Helpline.Here is an extract from one of their leaflets.
When you really want a cigarette—try the four Ds:
1.Delay:Look at your watch and wait for a couple of minutes.If you can wait two minutes,you won't want to smoke.
2.Distraction:Whatever you're doing when you want to smoke—do something else!For example,if you're alone,find someone to talk to.If you're sitting down,take a short walk.
3.Drink water:If you drink water,you reduce the need to have something in your mouth.
4.Deep breathing:Breathe in slowly and deeply.Count to five when your lungs are full.Then breathe out slowly.Repeat several times.
And here are some ideas to help people to give up smoking:
1.Make a plan:Make a list of friends who smoke and places where you smoke.Don't see those people and don't go to those places!
2.Set a date when you're going to stop:Choose a time when you will be relaxed but also too busy to think about smoking.
3.Keep busy:Instead of smoking,make a phone call,take a short walk,talk with a friend.
4.Develop new interests:Exercise—walking,biking,jogging,swimming,or taking a gymnastic class—helps you to forget about cigarettes.

a1=32a2=根号（32平方+32平方）/2a3=根号（2*a2平方）/2=16a4=根号(16平方+16平方)/2a5=8 S=(1/2)*(a1平方+a2平方+a3平方+a4平方+a5平方 )

亲，作业帮收集了全国8000本寒假作业答案。扫描一下书背后的条形码，就出整本答案。我的寒假作业答案就在那找到的。

(1) 3*5+1=16
(2)4+(n-1)*3=4+3n-3=(3n+1)根 是一次二项式
（3）当n=669时 3*669+1=2008根

15.滥竽充数,拔苗助长,蒸蒸日上
19.四季顺序
42.对比方法

甲乙两人分别在A、B两地同时相向而行,与E处相遇,甲继续向B地行走,乙则休息了14分钟,再继续向A地行走,甲和乙分别到达B和A后立即折返,仍在E处相遇.已知甲每分钟走60米,乙每分钟走80米,则A和B两地相距多少米?
把全程看作单位1
甲乙的速度比=60：80=3：4
E点的位置距离A是全程的3/7
二次相遇一共是3个全程
乙休息的14分钟,甲走了60×14=840米
乙在第一次相遇之后,走的路程是3/7×2=6/7
那么甲走的路程是6/7×3/4=9/14
实际甲走了4/7×2=8/7
那么乙休息的时候甲走了8/7-9/14=1/2
那么全程=840/（1/2）=1680米

也就是长和宽的差越小,那么面积就越大
附：谢了!

0.025mol/(L.S) 0.0125 0.05
选择依次为ABC

答案是：走马观花,观棋不语,察言观色
可以的话,

如呆似痴 肝肠寸断
（2）喜悦 恐惧 悲痛
（3）在以后的岁月里……而不能痛哭!
（4）小孩子很幼稚,无所顾忌,有了伤心事,就尽情的哭,大人成熟了,学会了控制,学会了坚强,不会像小孩子那样尽情的表现出来了.

这种答案,没法找,我们没有题,除非你把题写上,或是照相照下来.我们给你答.

.

尼罗河：自南向北 热带沙漠 草原气候 注入地中海
刚果河：自东向西 热带雨林气候 注入大西洋 支流最多（地形区刚果盆地）
白：热带草原 青：高山高原
热带草原分旱雨两季
流经刚果盆地 热带雨林气候

不过我没有书.
希望你一题一题发出来,我一题一题给你回答.

= 1111 × 8 × 7 + 1111 × 44
= 1111 × （56 + 44）
= 1111 × 100
= 111100

They're going to travel around the world.They're going to cross the Pacific Ocean and the Atlantic Ocean.They're not going to use their angines.They're going to sail all the way.They hope it's going to be windy!
他们将要环游世界.他们将要横渡太平洋和大西洋.他们并不打算使用引擎.他们要一路扬帆行驶.他们希望有大风的天气.

李力：12×4=48(本）
因为李力的4分之一是12,12×4就是李力的本数
方军：48－12=36(本）
因为李力比方军多36本,48-12就是方军的本数

15.滥竽充数,拔苗助长,蒸蒸日上
19.四季顺序
42.对比方法
请采纳答案,支持我一下.

www.***.com.cn/ce/czyy/qnjs/czyy/200703/t20070315_345290.htm 这是人教新课标版七年级上的扫描版

画图像就是任取3个X带入，3点即可，X=3或X=1时，Y=0，第一个方程（X-1)(X-2)=0，解得X1=2，X2=1，第二个，X²+6X+9=0，(X+3)=0，解得X1=X2=-3，第三个方程因为△＜0，所以原方程无实根，（函数图象与X轴无交点），第四个方程解得X1=2分之1，X2=-1

9页

1、（单价）一定 （总价）与（数量）成正比例 （数量）一定 （总价）与（单价）成正比例
2、（速度）一定 （路程）与（时间）成正比例 （时间）一定 （路程）与（速度）成正比例

Pay attention!The train is coming!

我来补充题目：儿童的负重最好不要超过体重的20分之3.如果长期背负过重物体,会导致腰痛及背痛,严重的甚至妨碍骨骼生长.他的书包重5kg,体重是30kg （1）王明的书包超重吗?为什么?提问者你是哪的,我也读六年级耶~!

建议拍张清晰的照片提问，因为这样才能够让芝麻们更 好地帮助你O(∩_∩)O~
欢迎来知道提问O(∩_∩)O~
热情的芝麻们竭诚为你排忧解难O(∩_∩)O~
你的采纳是我们继续答题的动力O(∩_∩)O~

它只是为了更好的给咱展示二分二至日的时候的太阳直射点…为了对比,太阳光线不变,地球在不同的位置呈现不同的状态

是猪

2.2 世界湿地日 3.12 中国植树节 3.22 世界水日 4.22 世界地球日 5.22 国际生物多样性日 5.31 世界无烟日 6.5 世界环境日 6.11 世界人口日 6.17 世界防治荒漠化和干旱日 7.11 世界人口日 9.16 国际保护臭氧层日 10.4 世界动物日 10.16 世界粮食日 好吧 给积分吧 不知道对不对 反正我就这样写的

35千米
7218=3
32+3=35

可以把19页拍一下吗?

1.Cyling along the entire Mecong River .
2.Is WangWei .
3.In Qinhai province.North sea.
4.Glscier、valleys、waterfall、meander、plains
5.It is hard to breath and very cold
6.Wangkun:careful.Wangwei:breave、excited、stubborn

令√x +1=t,√x=t-1（t≥1） f（t）=（t-1）²+2（t-1）=t²-1
∴f（x）=x²-1（x≥1）

连墙件纯粹是受拉或受压杆件,按照结构力学的受拉或受压计算即可

一个长方体的底面是周长为8分米的正方形,它的表面积是20平方分米,它的体积是多少

该温度是3.8摄氏度

小小年纪这么懒,自己想

长方体 长方体 长方体 正方体
长 15 3 20 4
宽 4 1.6 15
底面积 60 4.8 300 16
高 12 5 10 4
表面积 576 55.6 1300 96
体积 720 24 3000 64

Ex1 FFOFO
Ex2
2.Good morning,sir.Would you please come in? Hello,please come in.
3.Permit me to lead the way,sir. Let me show you the way.
4.How do you do,Mr...er...? Hello,Mr...
5.I wonder;Mr Adams, if you'd mind... Mr Adams,is it OK if...?
May we ask what you're doing in this country...? Why are you in England?
Ex3
wandering roung London misrable,unhappy,anxious
behave politely and answers questions fully curious why he has been asked to go into the house
3.admits jis problems and asks for work;explains his situation hopeful that he might find a solution to his troubles
4.blame himself for his carelessness;remebers how hungry he was when he sees the food on the taable grateful that he was rescued;aware of his hunger
5.replies angrily anrgy, irritated
6.wants to open the envelope straightaway irritated that he cannot open the envelope at once
7.explains he wants a job not charity unhappy to be given money rather than workoing for it
8.agrees not to open the letter till 2 pm interested and curious

亲：高老师祝你学习进步,每天都开心V_V!
望采纳,thanks!

204 99
630 932
730 2820
500 44
140 178
1000 110
932 81
81 512
119 98

由题可知b=4a,c=5a,且a、b、c都不为零,
那么当a>0时,b-a=3a>0,即b>a,c-b=a>0,即c>b,得a

telephoning
这是一些打电话时候经常用到的词汇以及一些电话对话场景,希望可以帮助到您：
words
Land line
Office/home number
Pin number
Public phone
Telephone number
Extension
Transfer
Mobile/cell phone
Phone booth
Calling card
Operator
Answering machine
Voice message
SMS
Wrong number
Prank call
Long distance call
Local call
Phone book
Country/area code
Busy signal
Dial tone
Speaker phone
Automatic redial
Phrases
Answer the phone
Make/place a call
Leave/take a message
Return a call
Call someone (back)
Hang up
The line is busy
Get through to someone
On the phone
Beginner
A:hello,this is rich.
B:hi,rich.Is jim here?
a:he’s not in at the moment.Can I take a message?
B:sure.This is Claire.
A; does have your telephone number?
B:no,it’s 3725019281.
A:3725015281?
B:no,it’s 3725019281,it’s a 9,not a 5.
A:right.I’ll have him call you back.
B:can you tell him that it’s urgent?
A; sure can.
B:thanks a all.
A:no problem.
B:bye.
A:goodbye.
Intermediate
A:sandy,can you help me contact these people?
B:sure,what do you want me to tell them?
A:well,I need to confirm the time of their classes.
B:ok,where can I find their telephone number?
A:they are all listed here on this sheet of paper.
B:is it their home,office or cell phone number?
A:unless it’s marked differently,it’s their home number.
B:alright.What if I can’t get a hold of them by phone?
A:then,you should e-mail them with the information.
B; where can I find their e-mail address?
A:they should have then listed on their resume.
B:and if there aren’t any e-mail addressed?
A:then send them a SMS on their cell phone.
B:ok.That sounds easy enough.Have you called any of them yes?
A:yes.I called the first three people on the list,but they didn’t pick up.
B:did you leave a voice message?
A:i left a voice message on one---just for the first person on the list.
B:I see.What did you tell her?
A:I told her that she should call me back at my office number.
B:ok,so,maybe I should call her again.
A:yes,that sounds like a good idea.She might not get the other message in time.
B:one more question.It looks like some of these numbers are long-distance.Do you have a calling card that I can use to get through to them?
A:sure.You can use this one.The pin number is written on the back of the card.
B:alright.Thanks a lot.Don’t worry.I’ll take care of it.
A:great work .I’m off for the weekend!See you on Monday.
B:see you.

为一个10x8x2的长方体选择包装纸（单位：厘米）
1.29x8
2.30x18
3.85x3

建议拍张清晰的照片提问， 因为这样才能够让芝麻们更好地帮助你O(∩_∩)O~
欢迎来知道提问O(∩_∩)O~
热情的芝麻们竭诚为你排忧解难O(∩_∩)O~
你的采纳是我们继续答题的动力O(∩_∩)O~

继承遗产 享受美食 播发新片
谈论理想 支付稿费 谢绝参观
保护动物 企盼佳期 演奏名曲
维护尊严 精通棋艺 需要帮助

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