交流变送器主要作用是（）。
A、检测交流电压/电流
B、给监控箱提供工作电流
C、提供检测信号到单体
D、为控制单元提供信号来保护交流接触器
参考答案：A
Not until we have had a chance to discuss it thoroughly ________ perfectly.
A．the problem has been settled
B．has the problem been settled
C．will the problem be settled
D．the problem was settled
形成“内部人控制”的资产重组方式的是（ ）。
A．交叉控股
B．股权协议转让
C．股权回购
D．表决权信托与委托书
