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【单选题】
All of them were shaking（）laughter.
A.
over
B.
through
C.
with
D.
by
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举报参考答案：
举一反三
【单选题】设某试验的样本空间共有25个等可能的样本点，事件A含有15个样本点，事件B含有7个样本点，A与B的交含有4个样本点，则P(B|A)为( )。
A.
4/7
B.
4/15
C.
7/25
D.
以上都不对
【单选题】The percentage of immigrants in the United States varies greatly from region to region with the _______United States accounting for 14.8% of foreign-born population in the 1980s.
A.
Southern
B.
Northern
C.
Western
D.
Eastern
相关题目：
【单选题】设某试验的样本空间共有25个等可能的样本点，事件A含有15个样本点，事件B含有7个样本点，A与B的交含有4个样本点，则P(B|A)为( )。
A.
4/7
B.
4/15
C.
7/25
D.
以上都不对
【单选题】The percentage of immigrants in the United States varies greatly from region to region with the _______United States accounting for 14.8% of foreign-born population in the 1980s.
A.
Southern
B.
Northern
C.
Western
D.
Eastern
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