发动机过热原因：（）。 A.发动机转速过低 B.发动机转速过高 C.风扇皮带过紧或有

A passenger（旅客）told an air hostess that he needed a cup of water to take his medicine when the plane just took off. She told him that she would bring him the water in ten minutes.

The air hostess was kept so busy that she forgot to give him the water. As a result, the passenger was held up(延误) to take his medicine. Thirty minutes later, when the passenger’s ring for service sounded, she hurried over to him with a cup of water, but he refused.

In the following hours on the plane, each time the air hostess passed by the passenger, she would ask him with a smile whether he needed help or not. But the passenger never answered a word.

When he was going to get off the plane, the passenger asked the air hostess to hand him the passengers’ booklet（小册子）. She was very sad. She knew that he would write down sharp words, but with a smile she handed it to him.

Off the plane, she opened the booklet, and smiled, for the passenger put it. “On the flight, you asked me whether I needed help or not for twelve times in all. How can I refuse your twelve sincere smiles?”

That’s right! Who can refuse twelve sincere smiles from a person?

小题1:Ten minutes later, the passenger didn’t get the water because _________.

A．the plane didn’t take off

B．the air hostess was kept busy and forgot it

C．it wasn’t allowed to take medicine during the flight

D．there wasn’t enough water on the plane小题2:The underlined word “it” in Paragraph 4 refers to（指的是）the _________.

A．medicine

B．water

C．cup

D．booklet小题3:At last the passenger was _______.

A．satisfied with the air hostess

B．unhappy with the air hostess

C．angry at what the air hostess had said

D．too tired to blame the air hostess

成本控制系统以（）为基础，每当发生项目范围变更时，也要求对基本预算进行调整。

A．进度计划

B．工作说明书

C．绩效衡量指标

D．工作排序

在公园平静的湖水中，经常能看到从湖底，产生的气泡向上升，则气泡在水中向上升的过程中，下列说法正确的是（　　）

A．气泡所受的液体压强不变

B．气泡所受的液体压强变大

C．气泡所受的浮力变大

D．气泡所受的浮力不变

在社会主义市场经济条件F，政府职能的范围有( )。

A．企业的人事任免

B．企业的生产经营管理

C．企业的注册登记

D．企业的财务管理

启动回转式空气预热器应注意哪些事项？