如何做“紧急停止”的指挥手势？
参考答案：两小臂水平置于胸前，五指伸开，手心朝下，同时水平挥向两侧。
If you go there by ____train ,you can have quite a comfortable journey ,but make sure you get ___fast one.
A．/; /
B．/; a
C．the; a
D．the ; /
轮胎磨损或气压不足均不影响离地间隙的大小。
