1946年3月,在美国的富尔敦市你可能会听到英国前首相丘吉尔发表演说,这就是[ ]
A.就职演说
B.“铁幕”演说
C.和平演说
D.结盟演说
B
.She rose from being a nobody to become a superstar.
A.a famous person B. an unknown person C.an important person
不带延时的电磁式过电流继电器的动作时间不超过( )s。
A.0.1
B.0.2
C.0.4
D.1