汽轮机调速保护系统中，空气导向阀的作用？

阅读理解。

                                                              Submission Guidelines

     Before sending us a manuscript (稿件), look through recent issues (刊物) of the Post to get an idea of the

range and style of articles we publish. You will discover that our focus has broadened to include well-researche

d, timely and informative articles on finance, home improvement, travel, humor, and many other fields.

     The post's goal is to remain unique, with content that provides additional understandings on the ever-evolving

American scene.

     In addition to feature-length (专题长度的) article, the Post buys anecdotes, cartoons, and photos. Payment

ranges from $25 to $400.

     Our nonfiction needs include how-to, useful articles on gardening, pet care and training, financial planning,

and subjects of interest to a 45-plus, home-loving readership. For nonfiction articles, indicate any special

qualifications you have for writing about the subject, especially scientific material indicate one or two published

pieces with your article. We prefer typed articles between 1,000 and 2,000 words in length. We encourage you

to send both printed and online versions.

     We also welcome new fiction. A light, humorous touch is appreciated. We are always in need of straight

humor articles. Make us laugh, and we'll buy it. Feature articles average about 1,000 to 2,000 words. We like

positive, fresh angles to Post articles, and we ask that they be thoroughly researched.

     We normally respond to article submissions within six weeks. You are free to submit the article elsewhere

at the same time.

     Please submit all articles to Features Editor, the Saturday Evening post, 1100 Waterway Boulevard,

Indianapolis, IN 46202, (317) 634-1100.

1. Before sending a manuscript to the post, a contributor is advised to _____.

A. get a better understanding of American issues

B. find out the range of the articles in the Post

C. increase his knowledge in many fields

D. broaden his research focus

2. To submit nonfiction articles,a contributor must _____.

A. provide his special qualification

B. be a regular reader of the Post

C. produce printed version

D. be over 45 year old

3. From the passage we can learn that the Post _____.

A. allows article submission within six weeks

B. favor science articles within 2,000 words

C. have a huge demand for humorous works

D. prefers nonfiction to fiction article

某汽油喷射发动机冷启动后易熄火，以下哪项不正确？（）

A、氧传感器失效

B、进气温度传感器故障

C、节气门传感器故障

D、进气流量传感器故障

10个月大的婴儿，发热，曾患中耳炎，CT扫描如图所示，请选择正确的描述或诊断（）。

A.咽后壁软组织肿胀

B.其内密度不均

C.颈椎骨质未见明显异常

D.考虑为咽后壁脓肿

E.考虑为咽后壁寒性脓肿

为什么过滤开始时，滤液常常有混浊，而过段时间后才变清？

由于领导活动是一种具有高度综合性的实践活动，而且每个领导者应该是通才型人才，这就需要领导者科学的研究要以社会实践中的各方面知识和多种相关学科的理论为基础。这一段话主要支持的观点是( )

A．领导活动是一种高度综合性的实践活动，需要在实际工作中逐步摸索出一套行之有效的方法

B．要研究领导科学，须具备与领导活动有关的理论知识

C．对领导科学的研究，不能使理论与实践相脱离

D．对领导科学的研究，实践活动远远大于理论研究