将一个半径为6cm．母线长为l5cm的圆锥形纸筒沿一条母线剪开并展平．所得的侧面

阅读理解

       After SARS happened in Beijing, people's lifestyle changed a lot. People were busy exercising

every day in the backyards. Parks looked like busy shopping areas. People wanted to breathe clean

air and enjoy nature. It is necessary for people to take exercise outdoors. Skateboarding, swimming,

running-everyone has a way of building up their bodies. Badminton (羽毛球) and table tennis are good

choices.

       Liu Tong said, "I didn't exercise much before, because I was always too busy with work. But now

with the spread of SARS, I come here after work everyday."

       The virus (病毒) gave us a chance to think about a lot of things around us. Health became the first

thing for everybody. The sports goods (东西) became the most needed in Beijing.

1. After the SARS outbreak (爆发), people in Beijing were busy ______.

A. buying things

B. staying at home

C. exercising

D. taking medicine

2. During the time, people in Beijing liked _______.

A. skateboarding

B. doing outdoor exercise

C. swimming

D. running

3. What does the underlined word"here"mean?

A. Parks.

B. Shopping areas.

C. Offices.

D. Hospitals.

4. Why didn't Liu Tong do exercise much before?

A. Because he was very strong before.

B. Because he was always too busy.

C. Because he had no place to do exercise.

D. There was SARS virus around the world.

5. Which is the main idea of the passage?

A. SARS is a very serious virus, but everyone in Beijing isn't afraid of it.

B. Body-building machines and equipment are very popular in Beijing after SARS.

C. We should stay at home to fight against SARS.

D. SARS makes people pay attention to (注意、重视) their health.

活塞在正常工作中磨损（）。

A、很大

B、很小

C、合理

D、不正常

An invest or plans to purchase a security and gathers the following information about the security:

Face value	￥10000000
Maturity	10months
Stated annual rate	4%
Frequency of compounding	continuously

The security's present value is closest to:（）

A. ￥9531338

B. ￥9607894

C. ￥9672161

吴某因意外事故失踪。吴某的妻子艰难地带着两个孩子等待了3年，见吴某已无生还希望，便开始考虑再婚之事；为此，吴妻向人民法院申请宣告了吴某死亡，吴某的全部财产除了偿还其欠朋友的5000元之外，其余部分由吴妻和他的两个孩子以及吴某的父母依法继承。但就在吴妻准备再婚前1个月，吴某“人鬼情未了”竟然奇迹般地生还。请回答下列问题：

在吴某的死亡宣告被撤销后，如果吴某的妻子尚未再婚，则吴某与吴妻之间的婚姻关系如何：

A．自吴某生还之日起自行恢复

B．自向婚姻登记机关重新登记之日起恢复

C．自人民法院撤销死亡宣告之日起恢复

D．是否恢复取决于两个人的意愿

新陈代谢是生命的基本特征之一。