题目内容

Different from animals, the trees influence the earth's atmosphere by ______.

A. expelling carbon dioxide from their leaves
B. expelling oxygen from their leaves
C. directly reduce the blanket of gases
D. turning some carbon dioxide into lignin

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M: Well, the beaches are beautiful. But people there are terribly annoyed by the dirty air. I mean, the combination of fog, smoke and automobile exhaust. There is not enough wind to blow it away.
Q: What does the man think of Los Angeles？
(15)

A. The air is contaminated.
B. People there are exhausted.
C. It's too windy for swimming.
D. The beaches are dirty.

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What is the main function of cyanobacteria？

A. To make more dust storms.
B. To keep the soil flying.
C. To keep the soil to the ground.
D. To create more rocks.

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听力原文：W: George, where were you yesterday evening？ I expected to see you at the concert.
M: Oh, I waited for you at the comer of Thomas Street. Then I looked for you at your flat, but the house keeper said you were out.
Q: Why didn't they meet that evening？
(14)

A. They waited for each other at different concerts.
B. They waited for each other at different places.
C. They went to the street corner at different times.
D. The man went to the concert but the woman didn't.

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The earth is unfrozen today with the appearance of ______.

A. the methane blanket
B. a mile-thick layer of ice
C. new life forms
D. the carbon dioxide

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Different from animals, the trees influence the earth's atmosphere by ______.

A. expelling carbon dioxide from their leaves B. expelling oxygen from their leaves C. directly reduce the blanket of gases D. turning some carbon dioxide into lignin

M: Well, the beaches are beautiful. But people there are terribly annoyed by the dirty air. I mean, the combination of fog, smoke and automobile exhaust. There is not enough wind to blow it away.Q: What does the man think of Los Angeles？(15)

What is the main function of cyanobacteria？

听力原文：W: George, where were you yesterday evening？ I expected to see you at the concert.M: Oh, I waited for you at the comer of Thomas Street. Then I looked for you at your flat, but the house keeper said you were out.Q: Why didn't they meet that evening？(14)

The earth is unfrozen today with the appearance of ______.

A. expelling carbon dioxide from their leaves
B. expelling oxygen from their leaves
C. directly reduce the blanket of gases
D. turning some carbon dioxide into lignin

M: Well, the beaches are beautiful. But people there are terribly annoyed by the dirty air. I mean, the combination of fog, smoke and automobile exhaust. There is not enough wind to blow it away.
Q: What does the man think of Los Angeles？
(15)

听力原文：W: George, where were you yesterday evening？ I expected to see you at the concert.
M: Oh, I waited for you at the comer of Thomas Street. Then I looked for you at your flat, but the house keeper said you were out.
Q: Why didn't they meet that evening？
(14)