下列说法中，不正确的是[ ]
A．整数与分数统称为有理数
B．正数与分数组成有理数
C．两个负数相比较，绝对值大的反而小
D．0的相反数是0
答案：B
Mr Wang often says to her child, "You _______ play with fire (火). It's dangerous.
[ ]
A. mustn't
B. had better
C. needn't
D. may not
供电所应建立的绩效考核办法中其关键指标包含有（）。
A.低压故障报修率
B.抢修及时率
C.用户投诉率
D.电压合格率
