病人，男，68岁，右侧胸背部疼痛且1周，皮疹3天，查体可见右侧胸背部数片红斑基础上成

为了研究某种植物在恒温下生长规律，物理兴趣小组的同学设计制作了一台如图所示的恒温箱，箱内安装了一根电热丝。按实际需要，电热丝每秒钟向箱内提供176J的热量（设电能全部转化为内能），经选用合适的材料制成后用220V的恒压电源供电，测得该电热丝每秒实际供热1100J。

为使电热丝供热达到设计要求，在不改变电热丝阻值及电源电压的条件下，应怎样连接一个电阻元件？并通过计算确定这个电阻元件的阻值。

下列叙述中符合种群密度概念的是[ ]

A．每平方米草地中杂草的数量

B．某森林每平方千米范围内猞猁的数量

C．某湖泊一年中鲫鱼新增加的个体数

D．一亩水稻的年产量

阅读理解。

     Five years ago, David Smith wore an expensive suit to work every day. "I was a clothes addict," he

jokes."I used to carry a fresh suit to work with me so I could change if my clothes got wrinkled." Today

David wears casual clothes-khaki pants and sports shirt-to the office. He hardly ever wears necktie. "I'm

working harder than ever," David says, "and I need to feel comfortable."

     More and more companies are allowing their office workers to wear casual clothes to work in the United

States. The change from formal to casual office wear has been gradual. In the early 1990s, many companies

allowed their employees to wear casual clothes on Friday (but only on Friday). This became known as "dress-

down Friday" or "casual Friday." "What started out as an extra one-day-a-week benefit for employees has

really become an everyday thing," said business consultant Maisly Jones.

     Why have so many companies started allowing their employees to wear casual clothes? One reason is that

it's easier for a company to attract new employees if it has a casual dress code. "A lot of young people don't

want to dress up for work," says the owner of a software company, "so it's hard to hire people if you have a

conservative dress code." Another reason is that people seem happier and more productive when they are

wearing comfortable clothes. In a study conducted by Levi Strauss and Company, 85 percent of employers

said that they believe that casual dress improves employee morale (士气). Only 4 percent of employers said

that casual dress has a negative impact on productive. Supporters of casual office wear also argue that a casual

dress code helps them save money. "Suits are expensive, if you have to wear one every day," one person said.

"For the same amount of money, you can buy a lot more casual clothes."

1. David Smith refers to himself as having been "a clothes addict" because _____.

A. he often wore khaki pants and a sports shirt

B. he couldn't stand a clean appearance

C. he wanted his clothes to look neat all the time

D. he didn't want to spend much money on clothes

2. David Smith wears casual clothes now, because _____.

A. they make him feel at ease when working

B. he cannot afford to buy expensive clothes

C. he looks handsome in casual clothes

D. he no longer works for any company

3. According to this passage, which of the following statements is FALSE?

A. Many employees don't like a conservative dress code.

B. Comfortable clothes make employees more productive.

C. A casual clothes code is welcomed by young employees.

D. All the employers in the US are for casual office wear.

4. According to this passage, which of the following statements is TRUE?

A. Company workers started to dress down about twenty years ago.

B. Dress-down has become an everyday phenomenon since the early 990s.

C."Dress-down Friday" was first given as a favor from employers.

D. Many workers want to wear casual clothes to impress people.

5. In this passage, the following advantages of casual office wear are mentioned EXCEPT _____.

A. saving employees' money

B. making employees more attractive

C. improving employees' motivation

D. making employees happier

有以下程序
#include ＜stdio.h＞
main()
int x;
scanf("%d",&x);
if(x＜=3); else
if(x!=1O) printf("%d\n",x);

程序运行时，输入的值在______范围才会有输出结果。
A) 不等于10的整数 B) 大于3且不等10的整数
C) 大于3或等于10的整数 D) 小于3的整数

个人本位论