设f(x)=1+x21-x2，则f(12)+f(13)+f(2)+f(3)=（

.材料的电阻与温度有关,进一小研究表明:在温度化范围不太大时,电阻随温度的变化可以近似地表示为如下关系:R=R0(1+αT),其中,R是温度为T的电阻,R0是温度O ℃时的电阻，α称作电阻温度系数，单位是℃^－1。下面列出了一些材料在0－120℃的电阻温度系数：

材料	α/℃－1	材料	α/℃－1
铝	0.0039	铜	0.00393
碳	-0.0005	镍铜合金	0.000002
铁	0.0050	锰铜合金	0.000006
钨	0.0045

α>0的材料,随温度升高,材料的电阻将_______

在上述R-T图象中,其中_______表示金属电阻随温度变化的规律.

在上述材料中,最适合做定值电阻的材料是_______.

有一根铜导线,在0℃时的电阻为2Ω,则在100℃时的电阻大约为        .

《国务院关于完善企业职工基本养老保险制度的决定》（国发［2005］38号）的规定相比以前的基本养老保险制度发生了变化，下列（）不是变化的内容。

A.城镇各类企业职工都要参加企业职工基本养老保险

B.个体工商户要参加企业职工基本养老保险

C.灵活就业人员要参加企业职工基本养老保险

D.一般企业要按照缴费工资的20%缴纳基本养老保险费

Last year, Jack Bleed cut through the bone of his ring finger while working. The 31-year-old resident of North Little Rock, Arkansas, waited for about six hours at a nearby medical center while the medical staff there called all over town — even as far away as Dallas and Memphis — to find a hand surgeon to reattach his finger. Finally, a willing doctor was located in Louisville, Kentucky. But even though Bleed had insurance(保险), he would have to hire a private plane to get himself there, at a cost of $4,300. In the end, he charged the cost to two credit cards, and his finger was saved. His insurance company eventually covered the cost of the plane, but his experience makes people aware of the fact that trauma(外伤) care in the United States is not only geographically limited, but in many places, non-existent.

Only eight states — New York, New Jersey, Maryland, Illinois, New Mexico, California, Oregon, and Washington — have local, fully functional trauma systems. The remaining states have partial systems, and 12 — including Arkansas — have no trauma system at all.

Although the President has signed a bill of $12 million for the purpose of supporting trauma care systems nationwide, many in Congress(国会) are unwilling to spend government money for a service they think should be paid for by states, says Wayne Meredith, medical director for trauma programs at the American College of Surgeons. Meanwhile, many states have also failed to find the dollars to support trauma systems. To make matters worse, many people without insurance depend heavily on the emergency care services, placing a huge financial burden on the medical centers that serve them.

For the same reason, doctors, too, often go unpaid. They are unwilling to perform emergency care, worsening critical shortages of neurosurgeons, orthopedists, and hand surgeons — the very types of specialists Bleed needed at short notice.

Supporting a trauma care system doesn’t take much. A half-penny sales tax in Miami-Dade County makes its outstanding system work. In Arkansas alone, says Wayne Meredith, a well-funded trauma system would possibly prevent 200 to 600 deaths each year. If trauma care systems were to work well across the nation, experts say, many thousands of lives each year could be saved. “You don’t get much better return on your investment than that,” Meredith says.

小题1:

In Paragraph 1, the writer uses Bleed’s case to ______.

A．make a comparison

B．describe a person

C．introduce a topic

D．tell a story小题2:

Many people in Congress argue that trauma care systems should be supported by ______.

A．the President

B．each state

C．insurance companies

D．the US government小题3:

The example of Miami-Dade County shows that ______.

A．its tax policy is admirable

B．running a trauma system is profitable

C．a trauma system is not expensive

D．sales tax is not heavy in small counties小题4:

Why are the present trauma care systems in some states not satisfactory?

A．They are shared by all the states.

B．They are short of financial support.

C．The doctors are not well trained.

D．The hospitals can’t provide low-cost services.

医院经营管理目标是一切经营管理活动的依据，它既是管理活动的出发点，又是一切管理活动所指向的终点和要求达到的结果。（）

检疫出证