对硫磷中毒洗胃忌用()
A.2%碳酸氢钠
B.1:5000高锰酸钾
C.清水或生理盐水
D.鸡蛋清、牛奶
E.10%活性炭
参考答案:B
I'm amazed to hear from my school teacher again.________, it is ten years since we met last.[ ]
A. In a word
B. What's more
C. That's to say
D. Believe it or not
磨煤机断煤有哪些原因?怎样处理?