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【判断题】
套管式逆流换热器是形式最简单，应用最普遍的换热器。A.
正确
B.
错误
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举一反三
【简答题】简述双金属温度计的测温原理。
【单选题】Wealth is seldom _________ happiness.
A.
related to
B.
be responsible for
C.
has deteriorated
D.
occurs
E.
yearly
【简答题】试述双金属温度计的测温原理。
【简答题】按照句意选择下列词组填入空格内(如有需要,作适当变化) (at times| bring about | associate with| moreover | relate to | on the other hand | laugh at | no longer | have effect on | worry about) 6.Wealth is seldom ________ happin...
【简答题】Fill in the blanks in the following sentences with the words or phrases given . Change the form where necessary. Though great progress has been made in recent years, China is still a ___________ count...
【简答题】双金属温度计的感温元件是两片（）的金属片迭焊在一起制成。双金属片受热后由于两金属片的（）而产生弯曲，这是双金属温度计的测温原理。
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