问题 单项选择题

如果发现主起落架机轮存在“超容差”的前束状态,并已经确定不是由于零部件的弯曲或扭转变形引起的,这时应当:().

A.改变减震支柱轴颈内的转轴位置调整

B.更换减震支柱

C.在机轮轴的中心轴承背后放置垫圈或间隔圈

D.在防扭壁的中心枢轴上插入或拆掉垫圈或间隔圈,或改变它们的位置进行调整

答案

参考答案:D

阅读理解

One of the most wonderful things about having a positive attitude is that it can touch many people, and it often exists in our everyday life.

Recently, I stopped by a store to get a newspaper and a bottle of drink. The young woman at the check-out counter said, “That’ll be three dollars in all please.” She then glanced down at the paper I was buying and said. “I’m sick and tired of all this negative stuff-on the front pages. I want to read some good news for a change.” She then said, “In fact, I think soemone should just publish a Good News newspaper--- a paper with wonderful, inspirational stories about people over-coming difficulty and doing good things for others. I’d buy one every day!” she then thanked me for coming in and said, “Maybe we’ll get lucky tomorrow; maybe we’ll get some good news.” And she laughed. She made my day.

The following day after my business appointments. I dropped by the same store again to pick up bottled water and a piece of newspaper, but a different young lady was behind the counter. As I checked out I said “Good afternoon” and handed her my money. She said nothing, not a word, not a smile or not a gesture. She just handed me my change and in a negative tone ordered “Next!”

It hit me right between the eyes: Two people, the same age; one made me feel great, and the other, well, made me feel that I had inconvenienced her by showing up.

Every morning you should ask yourself this important question. “Who do I want to be today? The Grouch(不高兴的人) or ‘The Good News Girl?’” Your answer will go a long way toward determining the joy and happiness that you will experience in your life.

53. What does the first salesgirl dislike according to her words?

A. Those who have bad manners.         

B. The bad news in the newspaper.

C. The advertisements in the newspaper.   

D. The bad news who break the laws.

54. After he had bought a newspaper on the first day the author _________.

A. was very lucky and excited that day    

B. always remembered the girl’s word

C. read the news in the newspaper carefully 

D. was in a pleasant mood the whole day

55. We learn from the passage that the salesgirl the author met the next day was ________.

A. humorous         B. enthusiastic       C. very cool         D. positive

56. What does the underlined sentence in Paragraph 4 mean?

A. I was very surprised.                  B. I was especially angry.

C. I felt very unhappy.                   D. It hurt my heart badly.

单项选择题