Restrictionmapping限制性酶切作图
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运转风机与备用风机必须具备同等能力。
A. 正确
B. 错误
发现有人触电，应赶紧用手拉其脱离电源。?
A. 正确
B. 错误
Firefighting foam is only effective when the foam（）.
A. penetrates to the bottom of the fire
B. is kept saturated with low-velocity water fog
C. mixes with the burning fuel oil
D. completely covers the top of the burning liquid
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