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问题
单项选择题
水泥强度试条的养护池水温应控制在（）
A.20±2℃
B.25±2℃
C.20±1℃
D.25±1℃
答案
参考答案：C
填空题
Choose and write．（选择合适的单词填空。）
wasn't， were
1. Lingling________________tall then. She was short.
2. Lingling________________thin then. She was fat.
3. Lingling's grandparents________________ young then. Now,they are old.
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名词解释
代谢库
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