问题描述：
[单选]
The carbon deposits on the piston crown and in the ring grooves（）．
A．should be scraped
B．should be derusted
C．should be drilled out
D．to be brushed off
参考答案：查看无
答案解析：无
☆收藏
答案解析：无
☆收藏
上一篇：The cast iron（）for the cross-head are attached to the top section and seal off the crankcase．
下一篇：The cap and new shell are tightened up and then removed and the thickness of the wire measured by（）．
- 我要回答: 网友(216.73.216.187)
- 热门题目: 1.在检修连杆大端轴承时，必须换 2.在采用金属丝锁紧螺母时，金属 3.在检查（）的连杆大端轴承螺栓