皮皮学,免费搜题
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【单选题】
假定下列一阶矩及都存在,则下列说法不正确的是( )
A.
E(X+Y)=E(X)+E(Y)
B.
E(X-Y)=E(X)-E(Y)
C.
E(XY)=E(X)E(Y)
D.
Var(X+Y)=Var(X)+Var(Y)+2Cov(X,Y)
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举一反三
【单选题】____ by taking part in practice can the young people be toughened and hardened into steel
A.
Still
B.
Just
C.
Only
D.
Yet
【单选题】It’s her second time the long jump. [     ]
A.
to take part in
B.
to join
C.
taking part in D joining
【单选题】借方贷方多栏式明细账的账页格式一般适用于( )明细账。
A.
原材料
B.
应收账款
C.
预收账款
D.
本年利润
【单选题】下面关于美化表格的说法,不正确的是()
A.
可以使用 width 属性设置整个表格或单元格宽度
B.
可以使用 height 属性设置整个表格或行的高度
C.
可以使用 border 属性设置表格或单元格的边框
D.
如果使用 CSS 设置了表格( 标签)的边框,则设置的是整个表格的边框
【单选题】借方贷方多栏式明细账的账页格式一般适于( )明细账。
A.
待摊费用
B.
预提费用
C.
预收账款
D.
本年利润
【单选题】I _____ of your trying to earn some money by taking part time jobs, but please don’t neglect your studies at university.
A.
assess
B.
acquire
C.
appreciate
D.
approve
【多选题】多栏式明细账的账页格式一般适用于( )进行的明细核算。
A.
资产类账户
B.
收入类账户
C.
费用类账户
D.
成本类账户
【单选题】I'm afraid taking a part time job might ________ my time for study. [    ]
A.
cut off
B.
cut into
C.
cut down
D.
cut away
【单选题】For the Turner sisters and their classmates,taking a part­time job might ______ their time for study.
A.
cut off
B.
cut into
C.
cut down
D.
cut away
【简答题】In general, it’s hard to spend enough time in both concentrating on lessons and taking part in social activities. But I wanted to succeed in both. I knew this would be a challenge but I didn’t realize...
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