说明10W/40的粘度等级和项目要求。
参考答案:
10W/40属于多级油的粘度等级。10W/40的粘度等级有低温动力粘度、边界泵送温度和100℃运动粘度范围三个项目的要求。
The good result____ the correct methods, that is to say,correct methods the good result. [ ]
A. lies; lead
B. lead to; lie in
C. lies in; lead to
D. lies to; lead to
冷却水不仅要保证有足够的压力、适当的温度,还要保证足够的()