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【单选题】
水力学中单位质量力是A.
作用在单位体积液体上的质量力
B.
作用在单位重量液体上的质量力
C.
作用在单位面积液体上的质量力
D.
作用在单位质量液体上的质量力
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【简答题】画出差动电容式差压变送器的工作原理简图并说明它的工作原理。
【单选题】If______ to look after luggage for someone-else, inform the police at once.
A.
Asked
B.
to task
C.
asking
D.
having asked
【简答题】车蜡的选用应按照每种车蜡的()和()来区分。
【单选题】The police detective tried to find clues by ________ and repeatedly questioning the suspect.
A.
(A) careful
B.
(B) carefully
C.
(C) he is careful
D.
(D) to be careful
【单选题】The thieves ran away they caught sight of the police.
A.
as soon as
B.
because
C.
before
D.
although
【单选题】I felt ______ to death because I could make nothing of the chairman's speech.
A.
fatigued
B.
tired
C.
exhausted
D.
bored
【单选题】Police are continuing their search for a teenager who has _____ disappeared.
A.
obviously
B.
undoubtedly
C.
mysteriously
D.
reluctantly
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