水泥出厂前按同品种、同强度等级编号和取样。散装水泥和袋装水泥应分别进行编号和取样。
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37.水泥储存超过三个月，应重新检测其技术性质。
A. 对
B. 错
The book represent vividly the author's lifehis writing.
A. also
B. as much as
C. as well as
D. as well
He is studying diligentlyhe should fall behind others.
A. for fear that
B. so that
C. unless
D. after
People do not realize the importance of good healththey lost it.
A. until
B. when
C. after
D. as
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