In Paragraph One, the sentence "Experts long have been concerned about such growth", the phrase "concerned about" is similar in meaning to_____.
A. worried about
B. related to
C. engaged in
D. made a study of
查看答案
Snow-blindness may be avoided by_____.
A. concentration on the solid white area
B. providing the eyes with something to focus on
C. searching for something to look at in snow-covered areas
D. covering the eyeballs with liquid
纵向对策行为，是市场主体针对国家的调制行为所实施的博弈行为，既包括对国家调制行为的遵从、合作行为，也包括对国家调制行为的规避、不合作行为。 ()
A. 正确
B. 错误
【B18】
A. source
B. reason
C. colour
D. shade
【B14】
A. sleep
B. analysis
C. meanings
D. dreams
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