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【单选题】
洗衣机、空调、电冰箱等家用电器都使用三插头，插座上有一个是用来接地的。如果这个没有接地，则可能发生的现象是（ ）
A.
用电器消耗的电能增加
B.
人接触家用电器外壳时发生触电事故
C.
用电器的使用寿命缩短
D.
用电器不能正常工作
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Absence, substantial deterioration or failure of proper operation of the cargo deck area fire protection on tanker
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Absence, non-compliance or serious deterioration of lights, shapes or sound signal
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a%(int)(x-y)
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【简答题】 Food safety is considered to be an important public health issue that has caused governments all over the world to 1. ______________ to improve it. However, foodborne diseases are a 2. _________ gro...
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y=x+3=a
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查看完整题目与答案