题干

选择所听到的单词(  )

A:stay

B:straight

C:skate

上一题 下一题 0.0难度 选择题 更新时间:2011-05-19 10:27:44

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B

同类题1

任务型阅读

    Speaking in public is most people's least favorite thing. The reason is that we are all afraid of making fools of ourselves.____

    But stop biting your finger-nails. Public speaking is easy. It's just plain talking, and you talk all the time. Although I'm basically shy (honest!), I've been making speeches and talking on radio and television for more than 30 years, and I can tell you that public speaking is not a “gift” like musical talent.____ Here are some of the lessons I have learned:

    Your audience is going to come away with one or two of your main ideas. One or two. Not ten or 20.____ And if you don't have a clear idea of what you want to say, there's no way your audience will.____— how you are going to open, what major points you want to make and how you're going to close.

    When I do a radio or TV piece, I often write the last sentence first.____ A strong close is critical: the last thing you say is what your audience will most likely remember.

    The standard length of a vaudeville (杂耍) act is usually 12 minutes. If all those performers singing and dancing their hearts out couldn't go on longer without boring the audience, what makes you think you can?

A. Some people are born to be good at making speeches.

B. Anybody who can talk can speak in public.

C. Try to relax yourself before making the speech.

D. The more important the speech is, the more frightened we become.

E. If you can't express in a sentence or two what you intend to get across, then your speech is not focused well enough.

F. When you know where you're headed, you can choose any route to get there.

G. No matter how long or short your speech is, you've got to get your ducks in a row.

同类题5

阅读下面文章,完成下列小题。

南极冷还是北极冷?

袁林喜

    ①1929年11月29日,美国海军中校理查德·伯德飞越南极,成为第一个飞越南极的人。而就在3年以前,伯德也成功飞越了北极。所以也是第一个同时飞越过两极的人。

    ②你如果遇到他,会问什么问题呢?恐怕很多人会问这个问题:南极冷还是北极冷?

    ③南极冷还是北极冷?先让我们来看看中国的两极考察站。北极的黄河站位于北纬79°,夏天拜访那儿的人可以发现,考察站周围的海湾积雪全融化了,大量苔原植物生长繁茂,甚至出现很多开花植物,北极绒鸭、北极燕鸥等海鸟活跃起来,呈现出一片鸟语花香的景象,让人怀疑是否真的到了北极!相比之下,位于南纬62°的长城站却是另一番景象,考察站区常年积雪不融化,温度也低,动植物种类稀少。数据显示:北极的年平均气温为-10℃左右,最低纪录为-70℃;而南极的年平均气温为-25℃至-30℃,最低纪录是-90℃。显然,南极要比北极冷!

    ④那么,是什么原因导致南极比北极更冷呢?

    ⑤首先是南极与北极的地形差异。南极为大海包围的陆地,面积约 1400 万平方千米,其中约98%被大陆冰盖覆盖,而且这些冰盖的平均厚度可达近2000米,终年不化。北极地区则是陆地包围海洋,北冰洋主要被欧亚、北美大陆所包围,面积约1310万平方千米,其中冰面积约为850万平方千米,仅为南极冰面积的60%左右。而且,北极地区的冰雪在夏季会大量融化,导致夏季冰面积更小。此外,北极的北冰洋海水的热容量大,吸热本领强,吸收的热量就更多,导致北极比南极要暖和得多。

    ⑥其次,南极海拔比北极高。南极平均海拔高度为2350米,其中超过3000米的地方约占南极大陆面积的25%,最高约5140米,是世界上平均海拔最高的大洲。而北极近2/3的面积都是海洋,平均海拔仅与海平面相当。海拔越高温度就会越低,正所谓“高处不胜寒”,因此南极就会比北极气温更低。

    ⑦第三,南极热量交换比北极少。由于南大洋有绕南极的西风环流和南大洋环流,南极无论是大气环流还是大洋环流均比较封闭,与中低纬度的热量交换较少,得不到热量的有效补充。相比较而言,北极地区与中低纬度的大气环流和大洋环流的交换则比较频繁,来自于中低纬度的热量可以通过环流向北极地区进行有效输送,这样就导致北极比南极温暖。