滑动轴承能否得到良好的润滑,决定于轴与轴承间最小间隙处的滑油层能否保持足够的().A

题型:单项选择题

问题:

滑动轴承能否得到良好的润滑,决定于轴与轴承间最小间隙处的滑油层能否保持足够的().

A.厚度

B.温度

C.流动性

D.粘度

考点:民用航空器维修执照考试M15活塞式发动机M15活塞式发动机题库
题型:单项选择题

阅读理解。

     Clothes are important and necessary to us, but do you know how to choose suitable clothes in a

correct way? Here are some ideas for you.

     When you go shopping and want to buy some clothes, you should think about which kind of clothes

you really need and decide how much money you can spend on them. Then look at the labels that are

inside the new clothes.  They tell you how to take care of the clothes.  The label for a shirt may tell you

to wash it in warm water. A sweater label may tell you to wash it in cold water.  The label on a coat may

say "dry clean only" and cleaning in water may ruin(损坏) this coat. If you do as the directions say on the

label, you can keep your clothes looking their best.

     Many clothes today must be dry-cleaned. Dry cleaning is expensive.  When buying new clothes, you

had better check if they need to be dry-cleaned.  You can save money if you buy clothes that can be

washed or that are well made. Well-made clothes last longer. They look good even after they have been

washed many times.

     Clothes that cost more money don't always mean they are better made. They may not fit you, either.

On the other hand, less expensive clothes may sometimes look better and fit you well.

1. The first thing for you to do before you buy clothes is ________

A. to know how to wash them

B. to look for well-made clothes

C. to read the directions inside them

D. to see which kind of clothes you need

2. According to the passage, a sweater may be ________.

A. washed in cold water

B. washed once a week

C. washed in hot water

D. dry-cleaned only

3. What does the underlined word "label" mean?

A. 品牌    

B. 标签

C. 价格    

D. 尺寸

4. ________ look good even after they have been washed a lot of times.

A. Cheap clothes

B. Expensive clothes

C. Dry-cleaned clothes

D. Well- made clothes

5. The main idea for the passage is ________.

A. buying less expensive clothes

B. washing clothes in a right way

C. being a clever clothes shopper

D. choosing the well made clothes

题型:单项选择题

下列句子没有语病的一项是

A.斜阳里,想起秋风的颜色,就宽恕了那恼人的聒聒!

B.中华鳖蛋、河豚毒菌株从太空返回“尘世”后,将进入相关科研机构的专业实验室进行孵化繁殖试验。

C.实际上,旅鼠并非每年都大量繁殖,而是有节制的,并且有丰年和歉年之分,大约四年左右一个周期。

D.东盟各国应严格遵守《宣言》,就有关争议进行和平协商,不试图将南海问题多边化、东盟化,不采取导致局面复杂化的后果。

题型:单项选择题

指出下列各句的修辞手法。

(1)有亭翼然临于泉上者,醉翁亭也。(     )

(2)名之者谁?太守自谓也。(     )

(3)野芳发而幽香,佳木秀而繁阴,风霜高洁,水落而石出者,山间之四时也。(     )

(4)然而禽鸟知山林之乐,而不知人之乐;人知从太守游而乐,而不知太守之乐其乐也。(     )

题型:单项选择题

经过一次或多次冷拔后的钢筋,表面光洁度高,屈服强度提高40%~60%,塑性也大大提高。

题型:单项选择题

国际单位制中基本单位有()种。

A.3;

B.7;

C.6;

D.5。

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