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【单选题】
They asked______your health in their last letter.
A.
about
B.
on
C.
after
D.
of
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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
【单选题】_______ is NOT a political division on the island of Great Britain.
A.
Ireland
B.
Wales
C.
England
D.
Scotland
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
【单选题】_______ is NOT a political division on the island of Great Britain.
A.
Ireland
B.
Wales
C.
England
D.
Scotland
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