钢材的堆放高度应达到所堆宽度的3倍,否则,钢材堆放的高度不应大于其宽度。堆放时,一般应一端对齐,并在前面竖立标牌,写清工程名称、钢号、规格、长度、数量。
参考答案:错
I want to eat _____ bananas. Are there _____ bananas here? [ ]
A. any; some
B. any; any
C. some ; any
D. some ; some
下列哪一类窗户的传热系数最小()?
A.单层钢窗
B.单层塑料窗
C.单框双玻塑料窗
D.单框双玻钢窗