使用摇表测量高压设备绝缘应由两人担任。
参考答案：对
There were already 4 people in the car but they managed to take John as well. It ______ a comfortable journey.
A．can’t be
B．wouldn’t be
C．mustn’t have been
D．couldn’t have been
（）为MPC的基本性能。
A.动画处理能力
B.图像处理能力
C.声音处理能力
D.多媒体数据的存储能力
