I'm in heaven.Does this mean ___________?
A. I'm delighted
B. I'm unhappy
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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
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
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