电能变送器是将通过电路的电能转化为()与之成正比的电脉冲信号。
参考答案:频率
Generally speaking_______acording to the
instructions,the drug has no side effect.
A.when taking
B.when taken
C.when to take
D.when to be taken
What day is it today?()
A.It's March
B.It's a fine day today.
C.It's March today.
D.It's Monday.