In those regions,especially the Sudan,where there is enough

这是一个在Y轴上的椭圆,要求的是与直线x=2^(3/2)围成的最小面积
把直线方程代入椭圆得y=±6√2
根据对称性,对x进行积分得
2∫[2^(3/2),4]√（144-9x^2)dx（直接用公式）
=2[1/3*3x/2*√（144-9x^2)+144/2arcsin(3x/12)][2^(3/2),4]
数值自己算吧

C traveling 表示状态,时间状语
D had been 虚拟语气

mountains

mountainous

That后面引导主语同位语,all parrots are native to tropical regions是真正主语.句子主干是That is unture.
Cats and dogs用了名词的复数形式,是泛指猫和狗,表示一类动物用名词复数形式.that是特指某个事物了,后面也不能用名词复数形式.these后面可以用名词复数.

在极地地区的夏天,太阳总是在天空中吗

在世界上某些地区,风暴会造成巨大的破坏.这些地区无一例外的处在大洋的边缘.具有如此威力的风暴被命名为“龙卷风”.“飓风”这个词被定义为北大西洋的风暴.
龙卷风和飓风有一个很有趣的不同：在龙卷风里,风是按照顺时针方向运的；而在飓风里,风则是按照逆时针方向运动的.但是他们有一个共同的特征,就是在大地和海洋上的破坏力都是相同的.
澳大利亚面对印度尼西亚的北部海岸每年都会经历几次龙卷风.它们主要发生在12月和1月,也就是南半球的夏季.
通常澳大利亚的飓风不会造成严重的破坏,因为澳大利亚北领地是广阔而人烟稀少的.海岸城市的数量很少.当龙卷风从内陆向海洋移动时,它通常不会经过有人居住的地区.然而,在1917年,一个名为Townville（不知道中文名叫什么）的小城曾经遭受过龙卷风的严重破坏.这次事件震惊了广大民众.他们需要足够的预警系统来预报这样的灾害.之后市政局会在每次大型龙卷风来袭之前进行预警.

1.Shanghai and Beijing.Because Shanghai is an international city and many foreign people go there because of the Shanghai Expo.Beijing is the capital city in China.So it is also very popular.
2.Xi'an.Because Xi'an is an old city.It has a long history and there are many places of interest there.The food there is also very good.
3.Many people would say computers.But I think the most useful invention is cellphone.It makes us together.We can connect the people we want to talk with at anytime and anywhere.
4.Maybe the air pollution.It is a world wide problem.Everywhere may have the air pollution.
5.We should save the environment from tiny things.Such as don't throw rubbish.Don't waste water and protect the grass.Something like that.
6.It is a healty way of life.It can make our environment better and make us healthier.
7.Not really.I believe most of the things I hear on news.Because everyone may make mistakes.We can't say that the news is the truth.
8.The Country.Because the environment is better there than in the city.And the pressure of working is weaker.I can enjoy a better life there.
9.It is hard to say.That depends on the way you surf the Internet.
You should not visit some bad website and pay attention to the messages which ask you for money.
10.I think security in my campus is good.The guards are very responsible and they all work hard.And the students all pay attention to their personal safety.
11.Pop music.As I am a young people.Pop music is good for me.I can feel the passion in the songs and I can be passionable when I listen to pop music.I like it very much.
12.Twilight.I like it very much though it is not so new.I like the story about the vampires.That interesting and exciting.
13.To tell the truth.That was really boring.All I could do was study and study.Of course,just because of the hard work in my primary school can I get into this college.
14.My country is a mysterious country and it has a long history.There are many places of interest here.No matter where you go you will have a wonderful experience in my country.
15.Our Chinese culture is very mysterious and we need to learn it and tell the people around the world about it.It has so many things that we haven't known.It is a treasure in our country.
好了..写得好辛苦..

手工翻译
在野外, 生石花存在于辽阔的非洲干旱地带.在几个年降雨量小于2英寸的区域,生石花也能生长.在这些极度干旱的区域,都起码有一种生石花仅仅靠薄雾和露水就能获得所需要的水分.在一些它们自己不能储存水分的区域,生石花则无法生长.实际上,很多干旱地带的植物都有这样的功能：它们的“身体”分成了两片倒圆锥型的叶子,植物顶端的裂缝就是两片叶子的分界口.他们没有茎,与叶子直接相连的就是那硕大而唐突的主根.

你居住地的人的性格怎样?

这个圈子用三根直线最多可以划分成多少小块?

在大脑的专门区域里,从眼睛输入（信息）进行加工再分配其他工作
in which 的用法：
in which是介词加关系代词,引导定语从句,翻译成“在...里面”
通常可以和when和where互换.
1949 is the year when (in which)new china was born.翻译成在那一年.
Ge is the school where (in which) I used to study.翻译成在那里.

如图：应该是选D.7个区域

一个等边的三角形用3条直线最多可以分成多少个区域.
那你拿张纸画一下就好了,很简单的哇,我画下来是7块,不知道有没有错.

黄山雄伟地屹立在安徽南部的丘陵地区之中,有着1200平方公里的面积,其中154平方公里为核心部分.
tower 是动词,“屹立”,第三人称单数为towers
of which 副词词组,“其中”

首先明确一下 这里that...therefore 不是句型
that引导的是定语从句（到therefore前）,用来修饰限定nerves,我们知道定语从句时附加成分,在这里可以先不看它,以使句子的主体更加明朗,即句子主干为：Nerves thereofore encode frequency tonotopically.
此处楼主对therefore的作用好像不太理解,therefore是一个副词（adv.因此；所以）,而且只能是副词,不可作连词,也就是说它不能单独用来连接句子,而是用来表示句子之间语义上的关系（用来表示结果）,如果楼主看过therefore连接句子,那么只有两种情况：一、and therefore,连接句子的其实是and,therefore只表示前后两句之间的关系,二、有分号出现,即; therefore,而此时连接句子的也同样不是therefore,而是分号.
既然是副词,它就可以出现在句子的任何位置,这句话也同样可以写成Therefore nerves encode frequency tonotopically.所以此处它并不表示nerves是encode...的原因（encode...并不是nerves的结果）,而是用来表示这一句和上一句话的关系,表明这句话所说的内容是上句话所说的内容的结果,以下为您所列出的句子的上一句：
Different regions of the basilar membrane in the organ of Corti,the sound-sensitive portion of the cochlea,vibrate at different sinusoidal frequencies due to variations in thickness and width along the length of the membrane.Nerves that transmit information from different regions of the basilar membrane therefore encode frequency tonotopically.

在一些地区,全球化遭到反对

打错了应该是：lighter regions marked with an extensive array of grooves and ridges吧
我在网上找到这文章了
更明亮的带有一系列沟和山脊的区域.
marked with 其实翻译时不用太注重,因为就是强调这片区域有这个特征
感觉有点怪因为是断开翻译的.

1.mountanous 多山的
2.agricultral 农业的
3.covered（be covered with 被...覆盖）
4.eating （be used to doing是习惯做某事）
5.attracts (吸引)

第一,潜在的分割区域进行分析,探讨了当地的变化和中风的像素投影概况（人数出现黑色像素和中风在每一列中,分别） .确定潜在的分割区域形象是一个字符串执行下列步骤：
（ 1 ）一栏标示非分割区域,如果其中风预测值为当地最低限度,它的像素预测值是当地最大.
（ 2 ）对于所有标签栏到目前为止,这些接连两次非分割区域属于分割区域.

Combatting the spread of terrorism in crisis regions
==【遏制危机区域恐怖主义的蔓延】

a Norwegian explorer of polar regions
挪威极地探险家

　　Of the million lives regions of poverty in some undeveloped or developing countries, people= people of the million lives regions of poverty in some undeveloped or developing countries 【 一些不发达或发展中国家中的拥有百万人口的贫困地区的人们】

　　把句子重新整理以下就是——

　　People (of the million lives regions of poverty in some undeveloped or developing countries) have witnessed that …

　　可见,介词短语of 结构是 people 的定语,在本句中采取了定语前置的修辞手段.这是因为：一方面定语太长,前置可以平衡句子结构,避免句子的臃肿；另一方面,定语前置可以起到强调作用.

　　另如：

　　定语前置：Of the students of his class, Tom is the tallest (one). 在全班学生中,汤姆个子最高.
　　正常语序：Tom is the tallest (one) of the students of his class. 汤姆是全班学生中个子最高的.

【参考译文】在一些不发达或发展中国家拥有百万人口的贫困地区中,人们已经亲眼看到在卫生保健方面早已给予各式各样的援助.