问题
单项选择题
大型低速柴油机扫气道着火又不允许停车，只能维持慢车航行时，应减速然后（）。
A．向扫气道喷射CO2灭火
B．停止引起着火缸高压油泵供油
C．加强冷却水流量降温
D．加强气缸油润滑
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
大型低速柴油机扫气道着火又不允许停车，只能维持慢车航行时，应减速然后（）。
A．向扫气道喷射CO2灭火
B．停止引起着火缸高压油泵供油
C．加强冷却水流量降温
D．加强气缸油润滑
参考答案：B
| 先阅读短文，掌握其大意，然后从方框中所给的词中选出最恰当的10个，并用其适当形式填空， 每个次限用一次。 | |
Some oranges do not have any seeds. Some have a 2______ skin, and some have a thin skin. The orange tree is beautiful. It has a lot of shiny green 3______. The small white flowers smell very sweet. An orange tree 4______ flowers and fruit at the same time. There were orange trees twenty million years ago. The oranges were very small, not like the 5______ today. The orange tree probably came from China. Many different kinds of wild oranges 6______ in China today. The Chinese started to raise (栽培) orange trees about 4,400 years ago. Farmers in other parts of Asia and the Middle East 7______ to raise oranges from the Chinese. 8______ they taught Europeans. The Spanish planted orange trees in the New World (North and South America). They took them to Florida 9______. Oranges are a very important crop in Florida Today. In English, orange 10______ both a fruit and a color. We use the name of the fruit for the color. |