According to the last paragraph, consumers who believe that organic foods are better than conventionally grown foods are often ______.
A. careless
B. mistaken
C. thrifty
D. wealthy
查看答案
Air moves under such conditions that______.
A. there is air pressure
B. the air is heavy
C. air pressure doesn't remain the same all the time
D. air comes up and down
郁达夫创作的散文名篇有
A. 《白杨礼赞》
B. 《荷塘夜色》
C. 《故都的秋》
D. 《箱子岩》
We don't allow（）in the meeting room.
A. to smoke
B. smoked
C. smoking
D. to smoking
The first paragraph mainly tells us______.
A. why we don't feel air
B. why atmosphere is important to us
C. why there is air surrounding us
D. why there is air pressure
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