骨架隔墙石膏板中间部分固定螺钉的间距不应大于( )。
A.100mm
B.200mm
C.300mm
D.400mm
参考答案:C
前后房容积分别为()
A.0.3ml,0.1ml
B.0.2ml,0.06ml
C.0.1ml,0.06ml
D.0.2ml,0.1ml
E.0.3ml,0.06ml
除实践以外,逻辑证明也是检验真理的标准。( )