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问题 单项选择题

下列哪些工作不属于航线维修（）.

A.按照飞机、发动机维护手册在航线进行的故障和缺陷的处理

B.为航空器进出港指挥、停放、推、拖、挡轮档、拿取和堵放各种堵盖

C.按照航空运营人提供的工作单对航空器进行的例行检查

D.按照运营人机型的MEL和CDL保留故障和缺陷

答案

参考答案：B

单项选择题

B

Uncle Li and Uncle Wang are good friends. They live next to each other and their farms are both at the foot of the mountain. So they can help each other. But neither of them likes to use his head. They’re both poor though they work hard. Most villagers have built new houses, but they still live in the low and broken houses. They never find out why.

Once Uncle Li went to the town to buy some medicine for his wife. In the town he heard the apples in a city were expensive. He told Uncle Wang about it as soon as he went back. They decided to carry some apples to the city. They borrowed some money from their friends and bought nearly 1000 kilograms of apples in the villages and carried them to the city on a tractor. Bad luck! A lot of apples has already been carried there when they arrived. A few days later they had to sell them at a low price. They felt unhappy and returned to their village.

"I can’t understand why we sustained (蒙受) losses in business while others always profit (赢利)" Uncle Li asked one day.

"The tractor was too small " Uncle Wang said without thinking. "We’ll carry more apples on a truck next time !"

"I agree!" said Uncle Li. "How foolish we were!\

Uncle Li and Uncle Wang were unhappy because（）.

A．they had sustained lasses in business

B．they had lost some money in the city

C．something was wrong with the tractor

D．other people profited in the city
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单项选择题

当承包商在施工中遇到现场施工条件与招标文件中描述的现场条件有很大差异时，承包商( )。

A．只能提出工程单价变更
B．只能提出施工进度变更
C．不能提出工程变更
D．可提出工程单价变更和施工进度变更
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