黄河入海口位于( )。
A．天津 B．江苏 C．山东 D．河北
参考答案：C
进行转子预热时，应防止转子冲动或盘车停止。当全部再热器温度超过（）℃时，停止转子预热工作。
Would you please drive more quickly? My plane will_____in twenty minutes.
I want to but safety comes first.
A．take off
B．take up
C．take down
D．take out
