定义在R上的偶函数满足：对任意x1，x2∈[0，+∞），且x1≠x2都有f(x1

确诊催乳激素瘤，血清PRL应（）

A.>100μg/L

B.<200μg/L

C.>150μg/L

D.>300μg/L

E.>50μg／L

阅读理解。

     Question: My ninth-grade art teacher doesn't give any grade above 94% because, she says, "There's

always room for improvement." In previous years, I earned a 99% and a 100%. The 94% I received this

term does not reflect the hard work that I put into this course. Because of her "improvement" theory, I

got a lower grade than I deserve Is her grading philosophy morally correct?

     Answer: Your teacher's grading system may be unwise, but it is not morally wrong. A teacher deserves

wide latitude in selecting the method of grading that best promotes learning in her classroom; that is, after

all, the prime function of grades. It is she who has the training and experience to make this decision.

     You can criticize her methodology. A 100 need not imply that there is no possibility of improvement,

only that a student successfully completed the course work A ninth grader could get a well-earned 100 in

English class but still has a way to go before he writes as well as Jane Austen. What's more, grades are not

only an educational device but are also part of a screening system to help assign (分配) kids to their next

class or program. By capping her grades at 94 while most other teachers grade on a scale that tops out at

100, your teacher could risk making a student lose a chance of getting a scholarship or getting into a top

college.

     What it is wrong to condemn her for is overlooking your hard work. Your hard work is worthy of

encouragement, but effort does not equal accomplishment. If scholars suddenly discovered that Rembrandt

had dashed off The Night Watch in an afternoon, it would still be The Night Watch.

     I could spend months sweating over my own "paintings", but I'd produce something you wouldn't want

to hang in your living room or your garage.

     One feature of a good grading system is that those measured by it generally regard it as fair and reasonable-

not the case here. Strong feeling of anger is seldom an aid to education And so your next step should be to

discuss your concerns with your teacher or the principal.

1. When writing the question, the ninth-grader was _____.

A. annoyed

B. worried

C. excited

D. delighted

2. The underlined word "latitude" in Paragraph 2 probably means _____. 

A. difference

B. knowledge

C. freedom

D. experience

3. Rembrandt's painting is mentioned to show that _____.

A. there's difference between effort and achievement

B. The Night Watch was completed in half a day

C. everybody's hard work should be encouraged

D. one is to blame for doing the work in a hurry

4. What is the author's attitude towards the grading system of the ninth-grader's teacher?

A. Supportive.

B. Confused.

C. Unconcerned.

D. Unfavorable.

新疆是我国西部大开发的重要阵地，有关新疆的说法正确的是（　　）

A．种植业主要分布在河谷地带，青稞品质优良

B．地处第二级阶梯，地形以高原、盆地为主

C．耕地、人口和城市主要分布在石油、天然气资源丰富的地区

D．位于我国非季风区，深居内陆，气候干旱

农药污染食品的主要途径有（）。

A.农药喷洒对农作物的直接污染

B.农作物从污染的环境中吸收农药

C.生物富集作用

D.运输和贮存中混放

E.以上都是

男，10岁，双上肢及右下肢Ⅲ度烧伤30%，伤后7天体温不升，呼吸40次/分，淡漠不语，创面颜色转暗，创缘下陷，痂下少许积液。首选创面处理方法是

A．包扎疗法
B．半暴露疗法
C．暴露疗法
D．温敷疗法
E．手术疗法