关于板块构造学说的正确观点是( ) A . 全球分为六大板块,印度洋板块几乎全部是海洋。 B . 一般说来,板块内部地壳比较活跃 C . 世界上的火山集中分布在板块内部 D . 世界上的地震集中分布在板块交界地带 答案:D13、Most of us have already known the problems
at the meeting which will be held tomorrow afternoon.
A. to
discus B. being
discussed C.
discussed D. to be
discussed