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【单选题】
Transactions______.A.
have weekly been documented
B.
have been documented weekly
C.
weekly have been documented
D.
have been weekly documented
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皮皮学刷刷变学霸
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【简答题】若X～B(n，p)且E(X)=12，D(X)=3，则n=______，p=______．
【简答题】He felt that people should be able to enjoy their work.
【单选题】巨幼细胞贫血时,网织红细胞计数值
A.
贫血越严重,升高越明显
B.
贫血越严重,降低越明显
C.
基本正常
D.
先升高,后降低
E.
治疗后升高,贫血被纠正后逐渐恢复正常
【单选题】设随机变量x～B（n，p），若Ex=2.4，Dx=1.44则（ ）
A.
n=4，p=0.6
B.
n=6，p=0.4
C.
n=8，p=0.3
D.
n=24，p=0.1
【单选题】He felt ___ duty to work for human rights and progress.
A.
it his
B.
his
C.
that is a
D.
that is his
【单选题】若集合P={x|x=2n,n∈N},Q={x|x=4n,n∈N},则P∪Q=
A.
{x|x=4n，n∈N}
B.
{x|x=2n，n∈N}
C.
{x|x=n，n∈N}
D.
{x|x=4n，n∈Z}