“火灾猛于虎”。下面有利于预防火灾的是（）①不私自挪动消防器

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问题单项选择题

“火灾猛于虎”。下面有利于预防火灾的是（）

①不私自挪动消防器材

②看完电视后拔掉电源

③点蜡烛熬夜看书

④边走边抽烟

A、①②④

B、①②

C、②③④

D、②④

答案

参考答案：B

选择题

— I'm afraid I can only make a small contribution this time.

— _____. We really appreciate your assistance. [ ]

A. Every little helps

B. The more, the better

C. It's better to give than to receive

D. The best things come in small packages

填空题

组合机床自动线的布局形式有（）形、折线形、框形、圆形、环形或椭圆形等几种形式。