24. Defied in the 5th paragraph probably means ________
A) doubted B) gave proof to
C) challenged D) agreed to
注:词汇题。定位倒数第二段,defy 前后意思相反,可以推出24题答案为C
25. This passage is mainly about _________
A) the beginnings of oceanography
B) the laying of the first undersea cable
C) the investigation of ocean depths
D) the early intercontinental communications
注:主题关键词为oceanography
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