Jim said the book ____ very interesting. [ ]
A. be
B. is
C. was
D. are
答案：C
自动重合闸的不对应启动方式的特点是（）
A.能够对故障相实现选相固定
B.简单可靠
C.不能纠正断路器误动
D.可纠正断路器误碰或偷跳
网站维护是
