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说出孔板有哪五种取压方式?

An aneroid barometer is an instrument().

A. used to measure the speed of wind
B. in which the pressure of air is measured
C. that tells which dirction a storm is coming from
D. used to measure the height of wave

“凡劳苦担重担的人可以到我这里来”出自马太福音哪章哪节?

向尾水管里补气,主要是为了减少()汽蚀对机组运行的影响。

A. 间隙
B. 局部
C. 翼型
D. 空腔

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