按弹性理论计算单向板肋梁楼盖时，板和次梁采用折算荷来计算的原因是（）
A. 考虑到在板的长跨方向也能传递一部分荷载
B. 考虑到塑性内力重分布的有利影响
C. 考虑到支座转动的弹性约束将减小活荷载隔跨布置时的不利 影响
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If he_____the storekeeper ‘s scissors ，he would have forgotten to buy a pair.
A. would not see
B. had not seen
C. having not seen
D. has not seen
He didn‘t seem to mind_____the music while he was studying.
A. them listening
B. them to listen to
C. when she returned
D. that did she return
It seems as if the sun_____round the earth since it rises in the east and sets in the west.
A. circles
B. is circling
C. has been circling
D. were circling
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