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【单选题】
一个人的Rh表现型为CcDEe其遗传型不可能是什么A.
CDE/cDe
B.
CDe/Cde
C.
CDe/cDE
D.
CDE/CDE
E.
CDE/cde
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举一反三
【单选题】They happened to ______for Tianjin when we got there.
A.
leave
B.
have left
C.
leaving
D.
had left
【单选题】They us willingly but they happened to be short of hands, too.
A.
would help
B.
would have helped
C.
were going to help
D.
must have helped
【单选题】They _____ us willingly but that they happened to be short of hands, too.
A.
would help
B.
would have helped
C.
were going to help
D.
must have helped
【多选题】随着电子商务的发展,其演变过程可分为以下( )三个阶段。
A.
基于EDI技术的电子商务
B.
基于内联网的电子商务
C.
基于互联网的电子商务
D.
基于e概念的电子商务
【判断题】The narrator met Dacre when they happened to be conducting researcher in the same room in the British Museum.
A.
正确
B.
错误
【单选题】They happened to__________ for Tianjin when we got there.A.leaveB.have left###SX
A.
They happened to__________ for Tianjin when we got there. A.leave
B.
have left
C.
leaving
D.
had left
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