轴温报警仪的数字温度传感器常态下用500V兆欧表测绝缘，绝缘电阻应大于（）MΩ。
A.2
B.5
C.10
D.0.2
参考答案：C
That boy spent much time _____ computer games.
A play B playing C played D to play
如果是按FCA术语成交，则由买方订立运输合同或指定承运人。当卖方被要求协助订立运输合同时，按惯例只要买方承担费用和风险，卖方也可以办理。 ( )
