喜马拉雅山的形成主要原因是由于______板块与______板块之间的[ ]
A．碰撞
B．张裂
C．分裂
D．隆起
答案：A
--- Linda late for school.
--- But she arrives on time at present.
A．used to be
B．used to being
C．is used to
D．is used to being
粉煤灰地基工程中，粉煤灰烧失量不大于（）
A.12%
B.10%
C.8%
D.15%
