泥泞路对安全行车的影响是车轮极易空转和侧滑。
参考答案：对
In order to get happiness, many people chase after reputation or money aimlessly. However, in most cases, real happiness is actually ________.
A．at ease
B．at hand
C．at length
D．at random
喉黏液囊肿最常见的部位是（）。
A.室带
B.喉室
C.会厌喉面
D.会厌舌面
E.声门下
