计算机使用总线结构的主要优点是便于实现积木化，同时减少了信息传输线的条数，其缺点是(

2001年美国高盛公司首次提出“金砖四国”概念，囊括了全球最大的四个新兴市场国家。“金砖四国”（BRIC）引用了巴西、俄罗斯、印度和中国的英文首字母，由于该词与英文中的砖（Brick）类似，因此被称为“金砖四国”。 南非加入后，其英文单词将变为“BRICS”，并改称为“金砖国家”。 2012年3月28日至29日，金砖国家领导人第四次会晤在印度首都新德里举行。中国国家 * * 胡 * * 等出席

（1）图示反映的“金砖”国家中地跨两大洲的国家是______,世界铁矿石重要输出国的是_____ ,有“黄金之国”美誉的国家在______洲。

（2）“金砖国家”中人口密度最小的国家是________，“金砖国家”主要分布在_____ （东、西）半球。除南极洲外，没有“金砖国家”分布的大洲是_____________。

（3）中国与印度共同面临的社会问题是_______，共同面临的自然灾害是___________________。

（4）巴西亚马孙平原，遍布茂密的热带原始森林，是世界上植物资源最丰富的地区。它被称为“地球之肺”。 人类若无节制的开发亚马孙热带雨林，会造成哪些恶果？（只要答对2例即可）

In the United States, train transportation is unpopular compared with cars and airplanes. Most people like traveling by car or by air. Officials of the United States Department of Transportation made a study in 2001. The study is about how many miles Americans traveled by different means of transportation. They only studied trips longer than 50 miles. The study showed that fifty-six percent of all miles were traveled in personal vehicle. Forty-one percent were traveled in an airplane. Two percent were traveled in a bus. And less than one percent of miles were traveled in a train. Amtrak is the national provider of train transportation in the United States. In the past ten years, the number of its passengers has increased by eighteen percent. Although the number of passengers has increased, it is still very small now. In countries such as France, Germany, or Japan, more people use trains. There are several reasons why many people ________________________.

Firstly, Americans love to drive their own cars. On highways, cars can travel as fast as trains. These highways connect all major cities in America．Secondly, many travelers like to be independent. When they use their own cars they can decide when to travel. Thirdly, many buses travel between major cities. Bus travel is less costly than train travel. In a huge country like the United States, cities are far away from each other. In some cases, travel from one city to another by train may take more than a day. Airplanes can carry passengers over long distances much faster. People who do not want to spend long time traveling by train decide to fly. For these people saving time is the most important thing.

小题1:What is the best title of the passage? (Please answer within 8 words)

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小题2:What does the underlined word “it” refer to? ( Please answer within 4 words)

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小题3:Fill in the blank with proper words. ( Please answer within 6 words)

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小题4:Complete the following statement according to paragraph 2.( Please answer within 6 words)

When they use their own cars they are

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小题5:Why American people have to travel a long time if they go from one city to another?

(Please answer within 10 words)

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诊断主动脉瓣关闭不全最重要的体征是（）

A.靴形心

B.水冲脉

C.心尖区第一心音减弱

D.心尖部柔和收缩期杂音

E.主动脉瓣区舒张期杂音

具有肠脂垂的肠管是（）

A.盲肠

B.空肠

C.结肠

D.十二指肠

E.直肠

简述联行资金汇划清算系统对汇划业务采取的批量处理和实时处理。