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问题
问答题 简答题
什么叫渗流?
答案
参考答案:
水通过坝体、坝基或坝肩空隙的流动。
选择题
I am afraid I would have little influence over her ______ her mind was made up on any subject.
A. until
B. once
C. though
D. unless
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单项选择题 B1型题
与Ⅰ型超敏反应有关的Ig是()
A.IgG
B.IgA
C.IgE
D.IgD
E.IgM
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