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【多选题】
关于 检验,下面说法正确的有A.
对2x2四格表,若n≥40, 但有1≤T<5时,需作连续性校正
B.
对RxC列联表,当有1个理论频数T<5, 需作连续性校正
C.
当所得P十分接近a水准时,需用确切概率法
D.
对2x2四格表,当有T<1时,需用确切概率法
E.
对配对四格表,当b+c<40时,需作连续性校正
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【单选题】Since Mr. Smith to London, he can tell us something about the city.
A.
has gone
B.
went
C.
will go
D.
has been
【单选题】He even________ to call the deal off if we didn't satisfy his demands. [ ]
A.
scolded
B.
threatened
C.
warned
D.
declared
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