问题 单项选择题

在有腐蚀性气体渗透作用的情况下,为防止容器内壁腐蚀,采用硫化橡胶板衬里时,衬里的方法为()。

A.衬二层硬橡胶

B.衬二层软橡胶

C.先衬一层硬橡胶,再衬二层软橡胶

D.衬二层半硬橡胶

答案

参考答案:A

解析:

热硫化橡胶板衬里的选择原则主要应考虑腐蚀介质的操作条件及具体施工的可能性。为了避免腐蚀性气体的渗透作用,一般宜用二层硬橡胶,不采用软橡胶。

阅读理解

第三部分 阅读理解(共20小题;每小题2分,满分40分)

第一节(共15小题;每小题2分,满分30分)

阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

A

Jordan Makes Basketball Hall of Fame

Last Monday, the former Chicago Bulls great was elected to the 2009 Basketball Hall of Fame class, adding another honor to his long list of accomplishments. With incredible acrobatic (特技的) moves and slam dunks(灌篮), Jordan was a 14-time NBA All-Star, a five-time NBA finals Most Valuable Player and the key figure on the 1992 US Olympic gold medal “Dream” Team.

Jordan retired twice during his 15-year career, and finished with 32,392 points, the third-highest total in NBA history behind Kareem Abdul-Jabbar and Karl Malone. His career average of 30.12 points per game is the best in the league’s history.

Although his career boasts(拥有)many glories, Jordan said entering the hall was what he never imagined. “I don’t like being up here for the Hall of Fame, because at that time, your basketball career is completely over.” Jordan said during a news conference. “I was hoping this day was coming in 20 more years, or that I’d actually go in when I’m dead and done.”

According to the Chicago Tribune, as Jordan accepted a Hall of Fame Jersey(运动衣), he turned to his former competitors David Robinson and John Stockton, who were also among the class of 2009, and threatened another comeback.

“Every time I see these guys, I want to put my shorts on,” said Jordan, 46, whose age has decreased everything but his desire.

His father once said that passion was what made his son special. From the moment he started playing games, Michael had to win. Once, Jordan traveled everywhere and anywhere to feed that competitive urge.

“He doesn’t have a gambling problem.” His father said, “What he does have is a competition problem. He was born with that. The person he tries to outdo(超过)most of the time is himself.”

56.This passage is mainly about__________.

A.everything Jordan has achieved in his life

B.the contribution Jordan has made to basketball

C.how Jordan grew to be a popular basketball player

D.why Jordan deserves to be in the Hall of Fame and his reaction

57.From what Jordan said during the news conference, we know that he_______.

A.dislikes the honor because it makes him feel old

B.hates the new honor because it’s not worth much

C.thinks the honor has been given to him too early

D.is planning a comeback to show his basketball career is not over

58.Paragraphs 1 and 2 are written to__________.

A.analyze what basketball skills Jordan is famous for

B.show how popular Jordan used to be in America

C.introduce what contributions Jordan made to Chicago Bulls

D.explain why Jordan is considered a great basketball player

59.What can we conclude from the passage?

A.Michael Jordan’s continuous efforts to outdo himself made him great.

B.Michael Jordan thinks playing basketball is like gambling.

C.Michael Jordan has gradually lost his desire to play, as he has grown older.

D.However great a player is, there is an end to his best time.

问答题