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【判断题】
若X U(0,1),Y U(0,1),且X与Y相互独立,则Z=X+Y也服从均匀分布。A.
正确
B.
错误
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举一反三
【单选题】________ display of fireworks lit up the sky.
A.
introspective
B.
subdued
C.
stunning
D.
supreme
【简答题】A Fourth of July ____(celebrate) includes a display of fireworks.
【单选题】The fellow was said to be _____ of a scholar. As _____ turned out, he was a cheat.
A.
something; he
B.
much; he
C.
something; it
D.
nothing; it
【单选题】He opened his mouth as if _______ something. [ ]
A.
saying
B.
said
C.
to say
D.
be said
【单选题】The finale ______________ the event was a grand display of fireworks.
A.
of
B.
for
C.
to
D.
about
【简答题】With another dramatic fireworks display Sunday evening at the National Stadium here, the Beijing Olympics came to a dazzling close, ending two weeks of spectacular athletic performances during an Olym...
【单选题】Some First Night celebrations end with a fireworks display.
A.
一些迎新庆典结束时会有烟火表演。
B.
烟火在第一夜庆祝结束时开始表演。
C.
烟火在某个迎新庆典结束时进行表演。
【单选题】— Was it what he said or something that he did ______ made you cry so sadly，Sarah? — No，not really．
A.
which
B.
that
C.
when
D.
what
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