燃机燃烧室的结构分为哪几个部分？
参考答案：
燃烧室的结构主要由壳体；扩压器；火焰筒；旋流器；燃油喷嘴；点火装置；联焰管；燃气收集器构成。
Questions 1-4
What does the speaker recommend if you do not want to drink much water during the flight？（）
A．Avoid junk food, salty foods, caffeine and alcohol.
B．Drink as little water as possible between meals.
C．Take drinks with less sugar, carbonation or caffeine.
D．Always have other fluid on the plane.
防治流砂的方法有（）。
