问题 问答题 简答题

为什么锅炉的辅机之间要设联锁?

答案

参考答案:一台锅炉的稳定燃烧,需要各种辅机来保证,它们有机的组合在一起运转,当某一辅机发生故障,将会破坏锅炉的正常燃烧以致造成灭火,为了防止锅炉灭火再次爆燃而损坏设备,锅炉辅机间都设计了联锁,一旦重要辅机发生事故,则要根据辅机在锅炉上的作用,对设备运行的影响进行操作,停止部分设备的运行和停炉。

阅读理解

I am wearing a small red ribbon this morning to remind myself and others around me that today is World AIDS Day.

The red ribbon, an international symbol of AIDS awareness, is gaining increasing public recognition as more Chinese, from top leaders to movie stars, wear it today.

Gone were the days when the topic of HIV/AIDS was a public and media taboo(禁忌). Over the past few years, we have watched, read and heard many stories from doctors, volunteers and public health officials at the forefront of HIV/AIDS prevention and treatment.

Quite a few people with HIV/AIDS have come forward to share their experiences on TV or in the media.

The local and central governments have become more forthcoming (be helpful) with their new prevention and treatment programmes, and financial input. The latter rose from less than 1 million yuan (US$ 121,000) in 1986 to a pledge of 800 million yuan (US$98.8 million) in the year of 2006.

The change from silence to public and media campaigns with official promises has been remarkable, especially since China battled through the SARS crisis.

But have we got a full grip on HIV/AIDS? What do we know about the extent of HIV/AIDS in China?

The figures, ranging from confirmed cases to estimates, remain debated. After all, no more than a year has passed since the policy of free medical tests was made public. Unknown numbers from the high-risk groups: drug addicts and people working in sex- related places as well as farmers who once sold blood could still be reluctant to come forward.

69. What does the red ribbon stand for?

A. AIDS                         B. World AIDS Day

C. AIDS awareness                 D. AIDS prevention and treatment

70. Which of the following is Not true according to the text?

A. The topic of HIV/AIDS was a public and media taboo in the past.

B. The topic of HIV/AIDS is now still a public and media taboo.

C. Now a lot of people with HIV/AIDS have come forward to share their experiences on TV.

D. The writer wears a small red ribbon because today is World AIDS Day.

71. In paragraph 5 “the latter” refers to ____________________.

A. financial input                     B. new prevention programmes

C. new treatment programmes           D. the central governments

72. We can learn from the text that high-risk groups of HIV/AIDS in China include the following EXCEPT __________________.

A. drug addicts                 B. people working in sex-related place

C. farmer who once sold blood    D. people getting close to those affected with HIV/AIDS

单项选择题