When he was a child, he’s already a confirmed television (addictive) ______.
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泵送混凝土的特点是拌和物的坍落度不小于100mm。( )
A. 对
B. 错
Ten years ago she could not have ______ (see) that her marriage would end in divorce.
水泥比表面积测定方法中使用的勃氏透气仪主要由U形压力计、透气圆筒、抽气装置三部分组成。( )
A. 对
B. 错