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【单选题】
设随机变量X与Y的分布列分别如下所示,且P(XY=0)=1,则P(max{X,Y}=1)=( )。 X -1 0 1 Y 0 1 p 1/4 1/2 1/4 p 1/2 1/2A.
0
B.
1/4
C.
1/2
D.
3/4
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举一反三
【多选题】下列有关资金市场表述正确的有( )。
A.
也称为货币市场
B.
也称为资本市场
C.
主要是满足企业对长期资金的需求
D.
主要是满足企业对短期资金的需求
E.
贴现属于资金市场业务
【单选题】In order to properly remove air from the casing of a centrifugal pump when starting, the pump should have a _____.
A.
positive head
B.
negative suction head
C.
mechanical seal
D.
vent valve attached to the casing at the top of the volute
【单选题】We didn't learn ______ in this lesson. [ ]
A.
something new
B.
new something
C.
anything new
D.
new anything
【单选题】—____ they have a new eraser? —No, they ____. [ ]
A.
Are; aren't
B.
Does; doesn't
C.
Do; don't
【多选题】下列关于资金市场表述正确的有( )。
A.
也称货币市场
B.
也称资本市场
C.
主要是满足企业对长期资金的需求
D.
主要是满足企业对短期资金的需求
E.
贴现属于资金市场业务
【判断题】Centrifugal p umps or compressors are devices that converts mechanical energy to kinetic energy.
A.
正确
B.
错误
【单选题】For immigrants, what New York used to be means nothing because_____
A.
they don't like New York at all
B.
they don't like the old things in New York
C.
they don't know much about New York's past
D.
they do not relate New York's past to their own roots
【简答题】Integer s=new Integer(9) Integer t=new Integer(9) Long u=new Long(9) 判断： (1).s.equals(t) (2).s.equals(u) (3).s==t (4).s.equals(new Integer(9))
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