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【单选题】
岩石中所有的孔隙体积与岩石总体积的百分比称为()。A.
总孔隙度
B.
绝对孔隙度
C.
相对孑L隙度
D.
有效孔隙度
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反馈参考答案：
举一反三
【单选题】What are Sarah and John planning to do as a last resort?
A.
Go to see the landlord.
B.
Go to the court.
C.
Move out.
D.
Lose part of their deposit but get the other amount.
【简答题】The manager or his assistant _____ planning to go. [ ] a. were b. are c. was d. be
【单选题】—Will you go home tomorrow evening? —No, I’m going to a lecture, or at least I’ m planning _________. [ ]
A.
to
B.
so
C.
that
D.
it
【单选题】It isn’t warm enough him his coat. [ ]
A.
to make; take off
B.
make; to take off
C.
to make; put on
D.
make; to put on
【单选题】在串级控制系统中,等效时间常数To2’减小与提高控制质量有何关系?下面哪种说法不正确?( )
A.
等效时间常数减小，系统的响应速度加快；
B.
等效时间常数减小，提高了系统工作频率；
C.
等效时间常数减小，整个系统的控制质量下降；
D.
等效时间常数减小，使系统的振荡周期得以缩短
【简答题】You won’t be warm enough in that delicate dress.
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