问题
单项选择题
下图中箭头表示植物体不同部位和不同条件下生长素的总体运输方向，其中有误的是（）
A.a
B.b
C.c
D.d
答案
参考答案：C
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下图中箭头表示植物体不同部位和不同条件下生长素的总体运输方向，其中有误的是（）
A.a
B.b
C.c
D.d
参考答案：C
| 阅读理解。 | |
| We may know some good health habits, but we don't realize how much difference they can make. In the 1970s, scientists at the University of California-Los Angeles asked 7,000 people about their health habits. Then they followed these people to see how long they lived. The scientists discovered that seven habits were closely linked with a longer life.
three or fewer of these habits lived another 21.6 years. People who had six or seven could expect to live another 33 years! But how do you change your habits? Make one small change every week. And be patient. It takes about 21 days to form a new habit. | |
| 1. The underlined word "they" (Paragraph 1)most probably refers to . | |
[ ] | |
| A. scientists B. good habits C. universities D. 7,000 people | |
| 2. One of the habits closely linked with a longer life is . | |
[ ] | |
| A. taking regular exercise B. drinking less water every day C. eating cakes between meals D. sleeping more than eight hours every night | |
| 3. The idea "these habits had a powerful effect on health" is supported with . | |
[ ] | |
| A. guesses B. stories C. experiences D. facts | |
| 4. In which page of a newspaper can you most probably read this passage? | |
[ ] | |
| A. News B. Health C. Business D. Sports | |
| 5. The passage is written mainly to tell people . | |
[ ] | |
| A. to keep a good weight B. to avoid eating to much C. to form good health habits D. to keep away from danger |
cosωt
