地震造成破坏的主要原因是什么?
参考答案:
从震原发出的地震波主要分为纵波和横波。纵波引起地面上下颠簸,横波使地面水平晃动,是造成破坏的主要原因。
But for the help of my English teacher, I _____ the first prize in the English Writing Competition.
A.would not win
B.would not have won
C.would win
D.would have won
冬季施工混凝土不宜采用哪种养护方法()。
A.蒸汽加热养护
B.暖棚法
C.常温覆盖并洒水
D.蓄热法