变压器过负荷时应（）。
A.立即拉闸限电
B.立即停役过负荷变压器
C.按有关调度指令转移负荷
D.立即调整主变压器分接头
参考答案：C
—These Maths problems are too hard to ______. Can you help me?
—There are many ways, but the most important is to try your best.
A．work out
B．come out
C．put out
D．look out
SARS冠状病毒的易感人群是
A．婴幼儿B．儿童和妇女C．老年人D．青少年E．全人群
