若喷嘴挡板机构正常工作压力变化范围是0.0055MPa,则其后串联的气动功率放大器的放大倍数应选为()。
A.5倍
B.10倍
C.15倍
D.20倍
参考答案:C
The “Home Electrical Appliances to Rural Areas” policy ________ to improve the life of those in remote
areas.[ ]
A. aimed
B. aiming
C. to aim
D. to be aimed
()不是CTU的输入端子。
A.CD
B.CU
C.R
D.PV