清除计算机中的病毒所用的杀毒软件属于（）。A、操作系统软件 B、语言系统软件 C、应

求未知数X 0.9x=72 x-7.5=7.5 x÷3.2=2.4

下列可导致FRC增高的疾病是（）

A.肺间质纤维化

B.ARDS

C.严重脊柱侧凸

D.阻塞性肺气肿

E.肺不张

I began working in journalism when I was eight. It was my mother’s idea. She wanted me to “make something” of myself, and decided I had better start young if I was to have any chance of keeping up with the competition.

With my load of magazines I headed toward Belleville Avenue. The crowds were there. There were two gas stations on the corner of Belleville and Union. For several hours I made myself highly visible, making sure everyone could see me and the heavy black letters on the bag that said THE SATURDAY EVENING POST. When it was suppertime, I walked back home.

“ How many did you sell, my boy?” my mother asked.

“ None.”

“ Where did you go?”

“ The corner of Belleville and Union Avenues.”

“ What did you do?”

“ Stood on the corner waiting for somebody to buy a Saturday Evening Post.”

“ You just stood there?”

“ Didn’t sell a single one.”

“ My God, Russell!”

Uncle Allen put in, “ Well, I’ve decided to take the Post.” I handed him a copy and he paid me a nickel. It was the first nickel I earned.

Afterwards my mother taught me how to be a salesman. I would have to ring doorbells, address adults with self-confidence, and persuade them by saying that no one, no matter how poor, could afford to be without the Saturday Evening Post in the home.

One day, I told my mother I’d changed my mind. I didn’t want to make a success in the magazine business.

“ If you think you can change your mind like this,” she replied, “ you’ll become a good-for-nothing.” She insisted that, as soon as school was over, I should start ringing doorbells, selling magazines. Whenever I said no, she would scold me.

My mother and I had fought this battle almost as long as I could remember. My mother, dissatisfied with my father’s plain workman’s life, determined that I would not grow up like him and his people. But never did she expect that, forty years later, such a successful journalist as me would go back to her husband’s people for true life and love.

小题1:Why did the boy start his job young?

A．He wanted to be famous in the future.

B．The job was quite easy for him.

C．His mother had high hopes for him.

D．The competition for the job was fierce.小题2:From the dialogue between the boy and his mother, we learn that the mother was _______.

A．excited

B．interested

C．ashamed

D．disappointed小题3:What did the mother do when the boy wanted to give up?

A．She forced him to continue.

B．She punished him.

C．She gave him some money.

D．She changed her plan.小题4:What is the text mainly about?

A．The early life of a journalist.

B．The early success of a journalist.

C．The happy childhood of the writer.

D．The important role of the writer in his family.

[背景材料]

某医院决定投资1亿余元，兴建一幢现代化的住院综合楼。其中土建工程采用公开招标的方式选定施工单位，但招标文件对省内的投标人与省外的投标人提出了不同的要求，也明确了投标保证金的数额。该院委托某建筑事务所为该项工程编制标底。2000年10月6日招标公告发出后，共有A、B、C、D、E、F等6家省内的建筑单位参加了投标。投标文件规定2000年10月30日为提交投标文件的截止时间，2000年月11月13日举行开标会。其中，E单位在2000年10月30日提交了投标文件，但2000年11月1日才提交投标保证金。开标会由该省建委主持。结果，其所编制的标底高达6 200多万元，与其中的A、B、C、D等4个投标人的投标报价均在5200万元以下，与标底相差1 000万余元，引起了投标人的异议。这4家投标单位向该省建委投诉，称某建筑事务所擅自更改招标文件中的有关规定，多计漏算多项材料价格。为此，该院请求省建委对原标底进行复核。2001年1月28日，被指定进行标底复核的省建设工程造价总站(以下简称总站)拿出了复核报告，证明某建筑事务所在编制标底的过程中确实存在这4家投标单位所提出的问题，复核标底额与原标底额相差近1000万元。
由于上述问题久拖不决，导致中标书在开标3个月后一直未能发出。为了能早日开工，该院在获得了省建委的同意后，更改了中标金额和工程结算方式，确定某省公司为中标单位。

[问题]

上述招标程序中，有哪些不妥之处，请说明理由。

(一)梦想中的乐园

地球上的资源是有限的，而地球上的人口却是在不断地增长，当地球的各种资源日趋枯竭的时候，人们便把目光投向了尚未开垦的处女地——广袤无垠的宇宙。人类试探着要把自己的活动领域扩展到太空去，在那里建电站、建工厂、建农场、建未来的太空城市，建设人类美好的太空乐园。
太空城市不是随便建在太空中就行的，必须保证它是永久的，不会坠落。经过科学家们的计算，在太空中离地球约38.4万千米远的区域，有一些特殊的点，在这些点上太阳、地球、月对的引力相互平衡。物体位于这些点上就不会轻易离开自己的位置。因此，科学家们便提出采太空城市建在太空中这些特殊的点上。
建太空城的地方有了，但太空城市又该是个什么样子呢许多人提出了自己的设想，其中美国科学家奥尼尔1975年设计出了一种称之为“宇宙岛”的太空城方案，它是一种简单易行的设计。
这个“宇宙岛”的外形像一个车轮子，直径约500米，它以一定的速度旋转，以产生模仿地球引力的“人造重力”。人在“岛”内不会四处漂浮，感觉像在地球上一样，同样可以头顶蓝天脚踏实地。“岛”的外壁有一层约2米厚的粗糙的外壳，可以抵挡宇宙中外来物的撞击，“岛”内建有太空工厂、太空农场、住宅、商店、医院、学校、餐厅、娱乐场所等设施，可以容纳上万人，是一个封闭的自给自足的人造生态系统。
还有一种设计，是大型的圆筒形空间城。城市建在一个直径为6.5千米、长32千米的大圆筒内。圆筒围绕竖直轴自转，以产生人工重力，居民可达上百万。太空城中有人造陆地、湖泊、河流，还有大片森林、公园，光照充足，气候宜人，并可人工控制昼夜和季节变化，真可算得上是理想中的世外桃源，天上人间。
人们设想中的太空城千姿百态，各具特色。可上千万吨的庞然大物怎样才能建造在如此遥远的太空呢显然，现有的任何火箭都无法将太空城整体发射上天。因此，建造太空城必须要有特殊的交通运输工具，才能解决物资设备和人员的运输问题。
航天飞机能自由地往返于地球和太空，但它要经过改进完善后，才能担负起如此艰巨而遥远的飞行任务。建造一座太空城，需要航天飞机无数次的往返飞行，将一个个太空舱和所需的设备、人员、机器人等送上太空。先在太空中装配成中型的宇宙站，然后以宇宙站作为立脚点，再建造太空城市，进行太空移民。
建造太空城，进行太空移民是一项非常庞大的系统工程。目前，有关国家正在进行相关试
验。随着航天技术的飞速发展，太空城市的设想，或许在不久的将来就会成为现实。人类的优秀子孙将飞离地球摇篮，去太空建造人类的第二故乡，他们是太空城市的建设者，也是第一批太空移民。也许，你就有幸成为太空城市的一位贵客。

(1)建造不同设计方案的太空城所面临的两个共同难题是什么
(2)面对这两个难题，人们设想的解决途径分别是什么