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？
