题目

The house is too expensive. _________, it’s a bit far from the company where I’m working. So I have decided not to buy it.   A. More or less   B. However    C. Sooner or later    D. Besides 答案：D 解析: 略19．要将2.2kV的电压升高至22kV，若变压器原线圈的匝数为180匝，则副线圈的匝数应该是1800匝．