试题与答案

Operating a propulsion diesel engine at le

题型:单项选择题

题目:

Operating a propulsion diesel engine at less than 30% of designed normal load for prolonged periods will result in ().

A.decreased fuel consumption per brake horsepower

B.more complete cylinder scavenging

C.extended valve life

D.carbon formation on combustion chamber surfaces

答案:

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参考答案:A

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题型:阅读理解

Nancy and Peter like sports. In summer they swim and in winter they ski. They are planning a ski trip for this weekend, but they don’t know about the weather. It’s 7:30 now, and they are listening to the weather report on the radio. The weatherman is giving the weather for the weekend.

“Friday is going to be cold and cloudy, but it’s not going to rain. It’s going to snow on Friday night and maybe Saturday morning. Saturday afternoon and Sunday are going to be cold and sunny.” Now Nancy and Peter are excited. The weather is going to be good for a ski trip. They are going to have a wonderful weekend in the mountains.

小题1:When do Nancy and Peter listen to the weather report?

A.Thursday evening

B.Friday evening

C.Friday morning

D.Thursday morning小题2:What are Nancy and Peter planning for the weekend?

A.A trip to the mountains

B.A trip to a swimming

C.A ski trip in the mountains

D.A trip in a city小题3:When is it going to snow?

A.On Friday morning

B.On Friday night

C.On Saturday night

D.On Saturday afternoon小题4:What will the weather be like on Sunday?

A.Cold and cloudy

B.Clear and sunny

C.Cold and sunny

D.Clear and cloudy

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