目前解放系列重型车后桥润滑采用（）。
A. GL-4中负荷车辆齿轮油
B. GL-3普通车辆齿轮油
C. GL-5重负荷车辆齿轮油
D. ATF自动传动油
在晋献公死后，是谁连杀奚齐、卓子，而欲立重耳为君？
Which of the following statements is correct concerning heat transfer?（）
A. Heat is given off from a high temperature region known as a heat sink
B. Heat transfer rate is affected most by the size of the heat sink involved
C. Heat transfer rate is affected most by the temperature difference between the heat source and the heat sink
D. Heat transfer by radiation will occur only by mass motion of a fluid substance
根据AQ1029―2007标准要求，封闭火区防火墙栅栏外宜设置（）。
A. 压力传感器
B. 一氧化碳传感器
C. 流量传感器
D. 馈电传感器
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