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【简答题】
离心式压缩机常见的原动机有哪些？
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皮皮学刷刷变学霸
举一反三
【单选题】When a false null hypothesis is not rejected, the researcher has made a
A.
type II error.
B.
sampling error.
C.
powerful error.
D.
type I error
【单选题】'Defied' in the 4th paragraph probably means ' ______ '.
A.
doubt
B.
gave proof to
C.
contradict
D.
agreed to
【单选题】There's a professor at the University of Toronto in Canada who has come up with a term to describe the way a lot of North Americans interact these days. And now a big research study confirms it. Profe...
A.
the way that modem people communicate on the Internet
B.
a social activity popular with North Americans
C.
the contradiction within network communication
D.
a newly invented Internet software
【单选题】It is widely believed that Columbus sailed westward to validate the theory that the world is round. In fact, it was already well known at that time that the world is round. Validate means _______
A.
think up
B.
prove
C.
contradict
D.
foresee
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