蒸汽的热能是通过汽轮叶片转变成机械能。
参考答案：对
—Do you know tomorrow?
—David? Never! He hates outdoor activities．
A．whether David will go cycling with us
B．when will David go cycling with us
C．that David would go cycling with us
D．who David would go cycling with
遇临时改变行车办法（停基改电、反向行车、绿色许可证）时，司机应做到（）。
A、一查阅核对、二停车确认、三远程指导
B、一停车确认、二远程指导、三查阅核对
C、一停车确认、二查阅核对、三远程指导
