如果|a|+|b|=0则a与b的大小关系一定是[ ]
A.a=b=0
B.a与b不相等
C.a与b互为相反数
D.a与b异号
答案：A
Peace and development are not only the goals of China, but also the most meaningful direction _____ the whole world should take.
A．which
B．that
C．what
D．in which
在（）的情况下，对电力设备状况进行连续或周期性地自动监视检测，称为在线监测。
A.带电作业
B.不停电
C.停电
D.试验
