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问题 选择题

某同学在自学“从科学社会主义理论到社会主义制度的建立”这一专题内容时，自制了多张学习小卡片，下图是其中一张，请指出有几个错误

[ ]

A．1个

B．2个

C．3个

D．4个

答案

答案：C

单项选择题

Speaker A: I’m awfully sorry. I hope I haven’t spoiled it.
Speaker B: ().

A. Oh, it’s nothing. Don’t let a little thing like that worry you.

B. I know you are unintentional. Just be more careful next time.

C. There is no need for you to say sorry. Anyway, I can buy a new one.

D. You are right. You haven’t spoiled it. You see, it’s still in good condition.
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单项选择题

以下必然会造成熔体输送泵异常停止的原因为（）。

A、出口压力高报

B、出口压力低报

C、泵有异音

D、泵振动大
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