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【单选题】
Pressure drop in an operating hydraulic system is developed ______.A.
only by the pump as its primary function
B.
by resistance to the fluid flow through the system
C.
by the thermal input to the system's fluid
D.
solely(单独地) by the charge applied by the accumulators
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举一反三
【简答题】请上传第一课课后练习题答案。
【单选题】The two boys have helped each other and formed a deep and lasting _________.
A.
friendship
B.
difference
C.
connection
D.
competition
【单选题】The two advertising agencies formed an alliance to seek_______to locate potential customers in times of difficulty.
A.
innocently
B.
suddenly
C.
cooperatively
D.
needlessly
【简答题】I have formed the habit of keeping a diary in English since I started senior high school two year a________. My English teacher encouraged us to write something in English, She told________(记录) what h...
【简答题】第一空请输入1-3题答案,第2空请输入4-6题答案,第3空请输入7-10题答案。可拍照上传。
【单选题】These compounds could not have been formed if the chemical reaction ______ stopped.
A.
have been
B.
has been
C.
had been
D.
were
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