通常在不同金属件接触面中间加防蚀涂层或绝缘层，主要是为了减弱（）A、晶间腐蚀 B、应

在报警显示中：空心的代表报警不存在（）

A.报警没有被确定

B.报警依然存在

C.报警不存在

D.低优先级

干性胸膜炎的典型临床特征是（）

A.呼吸时胸痛

B.结核中毒症状

C.发热

D.听诊胸膜摩擦音

E.叩诊浊音

（）是指正常条件下从采掘工作面采取的煤样，它可用来制定在正常条件下，采煤掘进过程中矸石的混杂程度。

A、分层煤样

B、生产煤样

C、生产样

D、商品煤样

阅读理解。

                                         Letters to the next president 

Dear Mr. President:

    I would like to personally thank you for your time and concern for our great country.

I would like to take a few minutes to address a few concerns that I have with the United

States.

    First of all, I would like to address the war. In my opinion, we should have never

been involved with Iraq to the extent that we are now. I believe we should pull our troops

out. However, I think there should be a time table that we follow but the time table should

not be released because the enemy does not need to know when we are going to pull out.

Also, the war takes out a ton of our money, which leads me to my next issue.

    The economy right now, in the opinion of many Americans is the biggest issue with which

we are facing right now. No one can predict what will happen one day or the next. The

obvious thing to do is to put 700 billion dollars in the economy, but that bill failed and

was rejected by the House of Representatives (众议院). Instead of putting 700 billion

dollars in, I think the money should be equally distributed among Americans to pay off

their debts. I'm not sure if this would work, but I think it is a positive alternative we

could take.

    My final issue I would like to call to your attention is teacher's salaries. The high

school students of today are America's future. In a way, America's future depends greatly

on the high school teachers of America. Saying this, it is sad that teacher's salaries are

where they are. While teachers are working harder and harder every day to teach high school

students, CEO's of big companies that are driving our countries economy into the ground are

getting bonuses. I'm not saying that teacher's salaries should be the same of CEO's of

companies, but I do strongly believe that action should be taken to increase the salaries

of teachers because they have one of the most important jobs in America-preparing our

country for the future.

    Once again, thank you for your time and your effort you put in to making this great

country a better place.

                                                                        Sincerely, Walker

1. What's the author's attitude the Iraq War? [ ]

A. Supportive

B. Objective

C. Negative

D. Positive

2. What's true about the time of pulling the troops out? [ ]

A. We should pull the troops out without delay.

B. There is no need to have a time table to follow.

C. The public has the fight to know the time table.

D. We should keep the time secret from the enemy.

3. According to the author, the 700 billion dollars ______.[ ]

A. is the biggest issue with which we are facing right now

B. has been accepted by the House of Representatives

C. should be equally shared among Americans

D. should be put in the economy

4. When talking about high school teachers, the author thinks that ______. [ ]

A. the teachers' salaries are not high enough

B. teacher's salaries should be as high as CEO's

C. the teachers work harder than CEO's of companies

D. teaching is more important than any other job in America

5. Which of the topics is NOT included in the letter? [ ]

A. Election

B. International affair

C. Finance

D. Education

萨姆定律规定，（）平面如相交于一直线，则可得到全面清晰的影像。

A、被摄体

B、镜头

C、影像

D、前座

E、后座

F、皮腔