一架装有变量泵供压系统的飞机,驾驶员反应在使用中系统压力表指示达到了安全活门打开压力

题型:单项选择题

问题:

一架装有变量泵供压系统的飞机,驾驶员反应在使用中系统压力表指示达到了安全活门打开压力,则表明:().

A.系统中的卸荷活门故障。

B.油泵故障。

C.动作筒负荷过大。

D.动作筒进油管路堵塞。

考点:航空职业技能鉴定考试B737机型飞机结构B737机型飞机结构题库
题型:单项选择题

阅读下面的短文,判断文后的句子是否与短文内容相符,复符合的选T, 不符合的选F。

                                                                 Life in 2050

     What will life be like in the year 2050? No one knows, but of course it will be very different from it today

Here are some predictions:

     Firstly, people will work fewer hours, and robots will do hard and dangerous work instead. So they will

have more free time for sports and travelling.

     Secondly, cars, will run faster, and computers will control (控制) the speed instead of people. So there

won't be any accidents.

     Thirdly, people will be able lo live in the sea. away from the crowded and noisy cities on land.

     Lastly, water will have become one of our most serious problems because there could be serious shortage (短缺). Some scientists open predict that water could be the cause of war if we don't act now.

( )1. Nobody knows what life will be like in the year 2050.

( )2. People wont need to work by the year 2050.

( )3. The sea will be too noisy and crowed for man to live in.

( )4. Water shortage could be serous in the future.

题型:单项选择题

Customers are asked to make sure that they______ the right change (零钱) before leaving the shop.

A.will give

B.will be given

C.have given

D.have been given

题型:单项选择题

* * 脱落细胞检查适用于()

A.妇科常规检查

B.卵巢功能测定

C.防癌普查

D.判断 * * 清洁度

E.宫颈癌早期诊断

题型:单项选择题

蛋白质多肽链合成的方向是从______端到______端,而阅读mRNA的方向是从______端到______端。

题型:单项选择题

据传亚伯拉罕是()的祖先。

A、希伯来和希腊民族

B、阿拉伯民族

C、希伯来和阿拉伯民族

D、阿拉伯和古罗马

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