下列说法不正确的是几项()?(1)通常远程飞机的腐蚀问题比中短程飞机严重。(2)飞机

题型:单项选择题

问题:

下列说法不正确的是几项()?(1)通常远程飞机的腐蚀问题比中短程飞机严重。(2)飞机在高空飞行时,机身内部不会形成冷凝水。(3)海洋大气中的氯离子对金属构件有催化腐蚀的作用。

A.0项

B.1项

C.2项

D.3项

考点:民用航空器维修执照考试民用航空器维修执照考试综合练习民用航空器维修执照考试综合练习题库
题型:单项选择题

建设工程项目总进度目标论证的工作步骤包括()。

A.项目结构分析

B.调查研究和收集资料

C.协调各层进度计划的关系

D.确定总进度目标实现的条件

E.编制各层进度计划

题型:单项选择题

汽缸与活塞环磨损会使汽缸密封不严,产生严重漏气,造成发动机不容易启动,发动机没劲,(),还会出现排气冒蓝烟,烧机油。

A.功率增大而耗油减少

B.功率增大而耗油增多

C.功率下降而耗油减少

D.功率下降而耗油增多

题型:单项选择题

如果一个进度计划系统由总进度计划、项目子系统进度计划、项目子系统的单项工程进 度计划组成。该进度计划系统是由()的计划组成的计划系统。

A.不同功能

B.不同项目参与方

C.不同深度

D.不同周期

题型:单项选择题

某火力发电厂厂用电电压为6kV、380V,均采用中性点高电阻接地方式。请回答如下问题。

低压厂用电接地检测装置的构成宜用( )。

A.谐波电流;
B.馈线和电流;
C.零序电流;
D.接地设备上的零序电压。

题型:单项选择题

Part 4


Questions 26-45


·Read the following passage and decide which answer bestfits each space.
·For questions 26-45, mark one letter A, B, C or D on the Answer Sheet.
The "standard of living" of any country means the (26) person’s share of the goods and services which the country produces. A country’s standard of living, therefore depends (27) and foremost on its capacity to produce wealth. "Wealth" in this (28) is not money, for we do not live on money (29) on things that money can buy: "goods" such as food and clothing, and "services" such as (30) and "entertainment".
A country’s capacity to produce wealth depends upon many factors, most of which have an effect (31) one another. Wealth depends (32) a great extent upon a country’s natural resources. Some regions of the world are well supplied with coal and minerals, and have a (33) soil and a favorable climate; other regions (34) none of them.
Next to natural resources (35) the ability to turn them to use. China is perhaps as well off as the USA in natural resources, but suffered for many years from (36) and external wars, and for this and other reasons was incapable (37) her resources. Sound and (38) political conditions, and freedom from foreign invasion, enable a country to develop its natural resources peacefully and steadily, and to produce more wealth than another country (39) well served by nature but less well ordered.
A country’s standard of living does not only depend upon the wealth that is produced and (40) within its own borders, but also upon what is indirectly produced through international trade. For example, Britain’s wealth in foodstuffs and other agricultural products would be much (41) if she had to depend only on those grown at home. Trade makes it possible for her surplus manufactured goods to be traded abroad for the agricultural products that would (42) be lacking. A country’s wealth is, therefore, much (43) by its manufacturing capacity, (44) that other countries can be found ready to (45) its manufactures.

A.likely

B.otherwise

C.likewise

D.alike

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