问题 选择题

两足直立行走可使人类祖先( )

①身体重心下移 ②骨盆变长变窄 ③下肢骨增长 ④脊柱由弓状变为“S”形

A.①②

B.①②③

C.②③④

D.①③④

答案

答案:D

题目分析:恩格斯曾指出,直立行走是从猿到人转变过程中“具有决定意义的一步”,古猿的直立行走造成了前后肢的分工,直立行走使古人类能够将前肢解放出来,能使用工具,前肢所从事的活动越来越多,上肢更加灵巧,古猿慢慢的进化成了人类,直立行走使得人类祖先身体重心下移、下肢骨增长、脊柱由弓状变为“S”形。

阅读理解

阅读理解。

     Four girls were at the same school. They were good friends, so they often studied and played

together. They went to school every day by taxi.

     One day one of the girls said, "There is a test this morning. Let's go to school late. Then we won't

have to take the test." "What can we tell the teacher?" One of the girls said. "He'll be angry. We'll need

a good excuse."

     The girls thought for several moments, then one of them said, "Let's tell him that our taxi had a flat

tire (爆胎)." "That's a good idea," the other girls said. "We'll tell him that."

    They arrived at school an hour later. The test was finished.

    "Why are you late?" the teacher asked. "You miss the test." "Our taxi had a flat tire," one of the girls

said.

     The teacher thought for a moment, then he said, "Sit down, one of you in each corner of the room."

The four girls did this. Then the teacher said, "Write the answer to this question on a piece of paper:

Which tire was flat?"

1. The four girls went to school every day by ______.

A. bus

B. taxi

C. subway

2. There was ______ that morning.

A. a test

B. no classes

C. a trip

3. One day the four girls were late for school because ______.

A. they didn't like the teacher

B. there was a car accident

C. they planned to miss the test

4. We can know from the passage that the teacher ______.

A. thought they were good students

B. didn't believe what they said

C. gave his students too many tests

5. The four girls sat down as the teacher said like Picture ______.

  

      A              B              C

计算题