检修BY.2型逆变器,其0.022μF涤纶电容应先用()直流电源进行耐压试验,然后再用电容进行容量检查。
A.110V
B.220V
C.800V
D.1200V
参考答案:D
暑邪的性质和致病特点是:
A.数变
B.炎上
C.炎热
D.生风
E.趋下
Oxford University is _______with tourists for its beautiful old buildings.
A.different
B.famous
C.special
D.popular