连接功率计测试朗讯基站功率前，需要关闭UCR的（）开关。
A.Active
B.TX
C.RX
D.Cell power off
参考答案：B
在空间直角坐标系中A、B两点的坐标为A（-1，2，3），B（2，-2，3），则|AB|=______．
They used to quarrel a lot, but now they are completely () with each other.
A. reconciled
B. negotiated
C. associated
D. accommodated
