交感神经兴奋时()
A.消化道张力增高
B.胃肠蠕动增强
C.消化道张力减低
D.胃肠蠕动减弱
E.胃肠排空加快
参考答案:C
某单位,Pjs=200kW,cosα=0.9,采用10kV、YJV型电缆为单位的电源进线,t环= 30℃。要求:
校其电压损失是否满足要求。
The number of the employees has grown from 1,000 to 1,200.This means it has risen ________ 20 percent.
A.at
B.by
C.to
D.with