在屋外变电所和高压室内搬运梯子、管子等长物应由()进行,并保持安全距离。
A、1人;
B、2人;
C、3人;
D、4人。
参考答案:B
— Shall I help you get a dictionary since I'll drop in at the bookstore this afternoon?
— . [ ]
A. It couldn't be better
B. Of course you can
C. If you like
D. It's up to you
疥疮外用药物主要是()
A.硫黄膏
B.三黄洗剂
C.白屑风酊
D.金黄膏
E.颠倒散洗剂