减速机油温高的影响因素（）。
A.油过滤器堵塞
B.冷却水阀门未开打开
C.冷却水压力低或堵塞
D.冷却水流量不够
参考答案：A, B, C, D
Li Lei wants to get some Beijing. [ ]
A. informations about
B. information about
C. he, to understand
D. it, understand
ants to get some Beijing. [ ]