离心式水泵灌满水后,应接通电源,使水泵运转后,再逐渐开大水泵的()。
A. 出水阀
B. 进水阀
C. 放空阀
D. 排水阀
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国有资产控股企业经营者的期股,每年所获红利应首先用于归还因购买期股的赊帐和贴息、低息贷款部分。
A. 正确
B. 错误
An aneroid barometer is an instrument().
A. used to measure the speed of wind
B. in which the pressure of the air is measured
C. that tells which direction a storm is coming from
D. used to measure the height of wave