安装并联电容器组可以提高负载的功率因数。
参考答案：对
跳汰机（）的宽度与（）的宽度之比称为冲程系数。
She was certainly not afraid of the dark. ____,it was only a 15-minute ride home. [ ]
A. However
B. Besides
C. Therefore
D. Otherwise
