在规定条件下,为确定计量仪器或计量装置的示值或实物量所代表的值与对应的被计量的已知值之间关系的一组操作称为()
A.检定
B.校准
C.标定
D.定值
参考答案:B
离心式压缩级用()最节能。
As a matter of fact, _____ of sleep can make you look tired, and even _____ putting on weight.
A. lose; cause B lost; result from C loss; result in D losing; lead