有胆管结石病多年，突发上腹阵发性胀痛，伴腹胀，呕吐，血压，血清钙下降，血清，尿淀粉酶

阅读理解。

     Fashion isn't very environmentally-friendly because it makes people buy things they don't need, just

because they're new. We want to take care of the environment, we don't want to pollute the air and we

don't want to waste energy and resources. But we also want to be fashiona-ble. How can we buy fashionable

clothes and protect the environment?

     Old styles are fashionable again, so one way is to buy second-hand clothes - recycled clothes. Another

way is to buy fair trade clothes. These clothes are either recycled or made in a way that protects the

environment. They also protect the people who make the clothes.

     Surprisingly, white cotton is one of the least environmentally-friendly crops of all. To protect the cotton,

the growers use chemicals that pollute water, make farm workers ill and kill wildlife. New materials, such as

hemp and bamboo, grow quickly and are more environmentally-friendly. These materials are very soft, and

look fantastic. The best materials are coloured using natural dyes, made from plants.

     Environmentally-friendly clothes are practical but until now they were often dull. Now fashion-designers

are working with these materials and the clothes are beautiful as well. So now we can buy fashionable clothes

that are also environmentally-friendly.

1. Why do people often buy things they don't need? Because ________.

A. new things can be more comfortable

B. everyone wants to be fashionable

C. people are richer than before now

D. people care about the environment

2. What's the topic for paragraph 2?

A. Recycled fashion.

B. The problem with fashion.

C. Fashion doesn't have to pollute.

D. New materials.

3. Which of the following is more environmentally-friendly?

A. Materials soft and looking fantastic.

B. Any materials coloured using natural dyes.

C. Hemp and bamboo.

D. White cotton.

4. Why are environmentally-friendly clothes more fashionable now? Because ________.

A. people pay more attention to our environment

B. environmentally-friendly clothes are practical

C. all old styles become fashionable again

D. fashion-designers are working to make them beautiful

5. What is the best title for the passage?

A. Cotton or Hemp and Bamboo?

B. Environmentally-friendly Clothes

C. Old Style, New Fashion Again

D. Fashion and the Environment

The common cold is the world's most widespread illness, which is a serious infection that man receives.

The most widespread mistake of all is that colds are caused by cold. They are not. They are caused by viruses passing on from person to person. You catch a cold by touching directly or indirectly, with someone who already has one. If cold causes colds, it would be reasonable to expect the Eskimos to suffer from them forever. But they do not. And in separate Arctic (北极的)areas, explorers have reported being free from colds until touching again with infected people from the outside world by way of packages and mail dropped from airplanes.

During the First World War, soldiers who spent long periods in the trenches, cold and wet, seldom caught colds.

In the Second World War, prisoners at Auschwitz concentration camp, bare and starved, were astonished to find that they seldom had colds.

At the Common Cold Research Unit in England, volunteers took part in experiments in which they gave themselves to the discomforts of being cold and wet for a long time. After taking hot baths, they put on bathing suits, allowed themselves to be with cold water, and then stood about dripping wet in a room. Some wore wet socks all day while others exercised in the rain until close to exhaustion. Not one of the volunteers came down with a cold unless a cold virus was actually dropped in his nose.

If then, cold and wet have nothing to do with catching colds, why are they more frequent in winter? Despite the most hard research, no one has yet found out the answer. One explanation offered by scientists is that people tend to stay together indoors more in cold weather than at other times, and that makes it easier for cold viruses to be passed on.

No one has yet found a cure for the cold. There are drugs and pain-killers such as aspirin, but all that they do is to reduce the symptoms.

小题1:The writer thinks the cause of catching cold is due to_______.

A．touching anyone directly

B．touching anyone indirectly

C．cold weather

D．getting viruses from person to person小题2:Arctic explorers may catch colds when___.

A．they are working in the separate Arctic areas

B．they are writing reports in terribly cold weather

C．they are free from work in the isolated Arctic regions

D．they are coming into touch again with the outside world小题3:Volunteers taking part in the experiments in the Common Cold Research Unit___.

A．suffered a lot

B．never caught colds

C．often caught colds

D．became very strong小题4:The passage mainly discusses___.

A．the experiments on the common cold

B．the mistake about the common cold

C．the reason and the way people catch colds

D．the continued spread of common colds

电路中不能再分的最基本的回路通常称为（）。

A、支路

B、节点

C、回路

D、网孔

肾癌动脉血管造影，正确的表现是（）

A.肾动脉不增粗

B.患侧肾动脉增粗，肿瘤周围血管移位、分离，呈"抱球"状

C.局部肾实质染色消失

D.肿瘤血管呈漩涡状或放射状排列

E.病灶内小动脉呈葡萄样扩张

某投资公司建造一幢办公楼，采用公开招标方式选择施工单位。招标文件要求：提交投标文件和投标保证金的截止时间为2011年5月30日。该投资公司于2011年3月6日发出招标公告，共有5家建筑施工单位参加了投标。第5家施工单位于2011年6月2日提交了投标保证金。开标会于2011年6月3日由该省建委主持。第4家施工单位在开标前向投资公司要求撤回投标文件和退还投标保证金。经过综合评选，最终确定第2家施工单位中标。投资公司(甲方)与中标单位(乙方)双方按规定签订了施工承包合同，合同约定开工日期为2011年8月16日。
问 题：

第4家施工单位撤回投标文件，招标方对其投标保证金应如何处理为什么