题干

德国科学家魏格纳在生病住院期间,有一次在观看世界地图海陆分布时,了解大洲、大洋、岛屿发现:在世界地图上,大西洋两岸,特别是非洲西岸与南美洲东岸轮廓线十分相似。南美洲大陆凸出的部分与非洲大陆的凹进部分几乎吻合的。后来他通过查资料,到大西洋两岸调查研究发现,两岸古生物相同或相近。为此,他对地球上海陆轮廓是怎样形成的,提出了自己的假说。请阅读上述材料,希望发扬科学家的精神,完成下题
魏格纳提出的假说是( )

A:地球膨胀说

B:海底扩张说

C:大陆漂移假说

D:板块构造说

上一题 下一题 0.0难度 选择题 更新时间:2019-05-31 02:02:01

答案(点此获取答案解析)

C

同类题4

根据短文内容,判断正误。

     "How are you?" is a nice question. It's a friendly way that people in the USA greet each other. But "How are you?" is also a very unusual question. It's a question that often doesn't need an answer. The person who asks "How are you?" hopes to hear the answer "Fine", even if the person's friend isn't fine. The reason is that "How are you?" isn't really a question and "Fine"

isn't really an answer. They are simply other ways of saying "Hello" or "Hi".

     Sometimes, people also don't say exactly what they mean. For example, when someone asks "Do you agree?", the other person might think, "No, I disagree. I think you're wrong..." But it isn't very polite to disagree so strongly, so the other person might say "I'm not sure." It's a nicer way to say that you don't agree with someone.

     People also don't say exactly what they are thinking when they finish talking with other people. For example, many talks over the phone finish when one person says "I have to go now." Often, the person who wants to hang up gives an excuse: "Someone is at the door." "Something is burning on the stove." The excuses might be real, or not. Perhaps the person who wants to hang up simply doesn't want to talk any more, but it isn't polite to say that. The excuse is more polite, and it doesn't hurt the other person.

     Whether they are greeting each other, talking about an idea, or finishing a talk, people don't say exactly what they are thinking. It's an important way that people try to be nice to each other, and it's part of the game of language.

根据短文内容,判断正(T)误(F)。