单发选择供油的特点是() A.燃油靠自身重力向发动机供油 B.通过选择某一电动泵来向

题型:单项选择题

问题:

单发选择供油的特点是()

A.燃油靠自身重力向发动机供油

B.通过选择某一电动泵来向发动机供油

C.通过燃油选择器控制左、右油箱向发动机供油

D.飞行员可根据需要选择上述任何一种方式进行供油

考点:民用航空器维修执照考试A319机型飞机系统试题综合练习A319机型飞机系统试题综合练习题库
题型:单项选择题

下边有关催化剂的说法正确的是(  )

A.二氧化锰只能做氧气分解的催化剂

B.催化剂只能加快反应速率

C.反应前后催化剂的性质和质量不变

D.动物身体里的酶也是重要的催化剂。

题型:单项选择题

从2006年2月22日起,杭州市普通出租车运价调整为:起步里程由现行4千米调整为3千米,起步价仍为10元;超过起步里程,运价仍保持现行每千米2元不变.从吴山广场到汽车东站路程为10千米,调价后需付多少元?

题型:单项选择题

阅读理解。

     Would you eat a ready meal from the fridge rather than cook from scratch? Have you been doing internet

shopping rather than going to the stores? What can't you be bothered to do?

     A study into how lazy British people are has found more than half of adults are so lazy that they'd catch

the lift rather than climb two flights of stairs.

     Just over 2000 people were quizzed by independent researchers at Nuffield Health, Britain's largest health

charity. The results were astonishing.

     About one in six people surveyed said if their remote control was broken, they would continue watching

the same channel rather than get up.

     More than one third of those questioned said they would not run to catch a bus. Worryingly, of the 654

respondents with children, 64% said they were often too tired to play with them.

     This led the report to conclude that it's no wonder that one in six children in the UK are classified as obese

(very fat) before they start school.

     Dr Sarah Dauncey, medical director of Nuffield Health, said:"People need to get fitter, not just for their

own sake, but for the sake of their families, friends and evidently their pets too.

     "If we don't start to take control of this problem, a whole generation will become too unfit to perform even

the most rudimentary of tasks."

     And Scotland's largest city, Glasgow, was shamed as the most inactive city in the UK, with 75% surveyed

admitting they do not get enough exercise, followed closely by Birmingham and Southampton, both with 67%.

     The results cause serious challenges for the National Health Service, where obesity-related illnesses such as

heart disease and cancer have been on a steady increase for the past 40 years and are costing billions of pounds

every year.

1. What causes children in the UK to be obese?

A. Eating ready meal.

B. Watching TV.

C. Doing Internet shopping.

D. Being lazy.

2. What can be inferred from the passage?

A. British people are too lazy to do anything.

B. Internet shopping will do harm to your health.

C. Many people would not run to catch a bus in Britain.

D. People should be more active and take regular exercise to keep fit.

3. Which of the following is Not true according to the passage?

A. One sixth of British people use remote control when watching TV.

B. People will benefit not only themselves but their families by getting fit.

C. Fatness can cause diseases such as heart disease and cancer.

D. More people get obesity-related illnesses now than 40 years ago.

4. What does the underlined word "rudimentary" (in the eighth paragraph) most probably mean?

A. basic

B. serious

C. vital

D. hard

5. All the following are among the most lazy cities in the UK except _____.

A. Glasgow

B. Birmingham

C. Nuffield

D. Southampton

题型:单项选择题

对序列中的元素通过适当的位置交换,将有关元素一次性地放置在其最终位置上,这种排序方法是______。

A.希尔排序

B.插入排序

C.快速排序

D.选择排序

题型:单项选择题

模板中相邻两块板的高低差允许值为()。

A.Y1

B.2

C.2.5

D.3

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