在开车节能上:要避免冷车启动,避免突然变速,选择合适挡位避免低档跑高速,定期更换(),高速莫开窗,轮胎气压要适当等。
A、汽油
B、柴油
C、机油
参考答案:C
Teachers _______ be sensitive to the development level of each student so as to help them better.
A.need to
B.may
C.are able to
D.can
中国1号信令规定采用公共信道信令方式。