在砖混结构中的墙体承重体系,大体分为三钟,( )不属于其中。
A.混合承重体系
B.纵向承重体系
C.横向承重体系
D.内框架承重体系
参考答案:A
If the dog hadn't woken us, we wouldn't have noticed the fire and it _____ to the house next door. [ ]
A. could spread
B. should have spread
C. would spread
D. might have spread
船板性能的基本要求是具有一定的()。
A、强韧性
B、成型性
C、焊接性能
D、耐磨性