阅读理解。
Man has a big brain(大脑). He can think, learn and speak. Scientist once thought that men are
different from animals because they could think and learn. They know now that dogs, rats, birds can
learn too. They are beginning to understand that men are different from animals because they can speak.
Animals can not speak. They make noises when they are afraid, or angry or unhappy. Apes
(类人猿) can understand some things more quickly than men. One or two of them have learnt a few
words. But they can not put words together to make sentences. They cannot think as we do because
they have no languages. The language is a wonderful thing. Man is able to build a modern world
because he has language.
Each child can speak his own language very well when he is four or five, but no animal learns to
speak. How do children learn it? Scientists don't know. They only know that man can speak because
he has the brain.
1. The best topic(标题)for this passage is ______.
A. Animals' learning
B. Man and Ape
C. Brain and Language
D. Man's Brain
2. Men are different from animals in the way that ______.
A. men can understand things quickly
B. men can learn
C. men learn to use language
D. men have brain
3. An ape can not ______.
A. make noises
B. understand things
C. learn words
D. speak like a man
4. Scientists now know ______.
A. how children learn to speak
B. why apes can learn a few words
C. man's brain helps him learn to speak
D. what happens when people speak
5. Which of the following is not true?
A. Apes can understand some things more quickly than men.
B. Apes have no language though(尽管) they can learn some words
C. Apes can put together the words they know
D. Some animals can learn.
所示。若飞越中不计空气阻力，摩托车可以近似看成质点，g取10m/s2。
