网络拓扑的主要类型有：（）、（）、（）、（）、混合拓扑及网形拓扑。
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通常乘务员需要为老年旅客提供毛毯。
A. 对
B. 错
如果目的地与客舱内温差较大，飞机下降前乘务员需要提醒并帮助老年旅客增减衣物。
A. 对
B. 错
（中译英）洗手间在客舱后部。
A. The lavatory is in the front of the cabin.
B. The toilet is at the back of the cabin.
C. The lavatory is in the rear of the cabin.
D. The toilet is over there.
（中译英）这是找零。
A. Hello, would you like to buy some duty-free goods?
B. What can I do for you?
C. Here is your change.
D. Keep the change.
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