问题描述：
[单选]
Before starting any diesel or gasoline engine，which of the following must be checked？
A．Oil level
B．Flow of cooling water
C．Exhaust discharge
D．All of the above
参考答案：查看无
答案解析：无
☆收藏
答案解析：无
☆收藏
上一篇：Diesel engines are considered safer than gasoline engines because（）．
下一篇：All marine low-speed diesels are of what design？
- 我要回答: 网友(216.73.216.136)
- 热门题目: 1.对偶件的磨损怎样检验？ 2.怎样测量轴承间隙？ 3.滑动轴承的安装有哪些要求？