题目内容

线性电路中的电压、电流和功率都可以通过叠加原理进行分析计算。

A. 对
B. 错

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有一冷水管道(未保温)穿过空气温度t=30℃,相对湿度为70%的房间,如果要防止管壁产生凝结水,则管道表面温度应为多少?当地大气压力B=101325Pa。

A. 20℃
B. 10℃
C. 15℃
D. 25℃

舒适性空调的换气次数每小时不宜小于()次?

A. 3
B. 4
C. 5
D. 6

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