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问题
单项选择题
基床加固过程中，石灰在作业前1-2星期熟化并过筛，其粒径不得（）。
A.大于5mm
B.小于6mm
C.大于6mm
D.小于7mm
答案
参考答案：
A
选择题
—These two bikes are both beautiful. Have you decided which to buy?
—Yes, I have. I'd like the blue one
the red one.
A. instead
B. instead to
C. instead of
D. instead on
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问答题 简答题
点火提前角过早或过晚对发动机性能有何影响？
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