试题与答案

我国家庭照明电路的电压是_________V,台灯和控制它的开关是_______

题型:填空题

题目:

我国家庭照明电路的电压是_________V,台灯和控制它的开关是__________(串联/并联)的,开关必须接在_________(零/火)线上.

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A, B, C, D解析:水文地质条件调查包括的内容十分广泛。除了包括含水层、隔水层的特征,地下水的特征,地下水监测井、地下水背景值等内容外,泉的情况,水源地的情况,气象、水文、土壤和植被状况,...

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