问题描述：
[单选]
When the starting air valve closes on one cylinder， another starting air valve has（）opened on another cylinder whose piston has just commenced its downward stroke．
A．just
B．nearly
C．merely
D．already
参考答案：查看无
答案解析：无
☆收藏
答案解析：无
☆收藏
上一篇：When to remove scale from the cooling spaces， acid solution（）in the system can be tested from time to time by putting some on to a piece of lime．
下一篇：When the order（）is received from the bridge， the main air stop valve in the starting air line should be shut．
- 我要回答: 网友(13.59.130.154)
- 热门题目: 1.废气锅炉受热面废气温度不能太 2.烟灰具有粘性，这是烟灰发生沉 3.废气流速低是废气锅炉烟灰沉积