题目内容

ideas don't drop fully formed from the skiesDoes this mean that ideas ________________?

A. need to be developed with careful thinking
B. are immediately created through good teaching

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in the long runDoes this mean_____________?

A. at a time in the future
B. with a great deal of effort

frighten the life out of someoneDoes this mean ________________?

A. to make someone very ill
B. to make someone extremely afraid and nervous

四氯二苯二恶英的缩写为()。

A. TCDDs
B. PCDDs
C. GDPPs
D. GCDDs

对于烟气中酸性气体的去除，目前得到广泛应用的技术是（）。

A. 干法烟气净化工艺
B. 半干法烟气净化工艺
C. 湿法烟气净化工艺