病毒具有什么样的化学组成和结构?

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问题:

病毒具有什么样的化学组成和结构?

考点:生物学环境工程微生物环境工程微生物题库
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已知
a
b
为单位向量,它们的夹角为
π
3
,则|
a
+
b
|
=______.
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世界经济论坛发布的《全球风险报告》认为,未来10年,全球发展的最大风险是财政失衡和收入差距扩大,这将威胁全球经济增长。我国在缩小收入差距、促进社会公平方面出台了许多有效措施。下列措施中,有助于缩小收入差距、促进社会公平的是(  )

①加快经济发展,大力增加财政收入

②提高劳动报酬在初次分配中的比重

③讲求效率,不断积累财富,增强综合国力

④建立和完善覆盖城乡居民的社会保障体系

A.①③

B.③④

C.②④

D.①②

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阅读理解。

     阅读下面的短文和问题,根据短文内容,在相应题号后的横线上写下相关信息(不

多于五个单词),完成对该问题的回答。答语要结构正确,书写工整,字迹清楚。

     London's Chinese community (社区) dates back to the 18th century, when a small number of Chinese sailors moved to the city to work in Limhouse, east London. As time went on, other Chinese people

came to this area and Limhouse began to be known as "Chinatown". However, London's Chinese

community remained very small for many years: at the start of the 20th century, there were just 545

Chinese people in Britain.

     After the Second World War, many farmers in Hong Kong lost their jobs and came to London. As

Limhouse had been almost destroyed during the war, they settled in a different area-a part of central

London near Leicester Square. This area is now what Londoners call Chinatown.

     At first, the new immigrants (移民) found it difficult to get jobs. In the 1950s, however, a small

Chinese restaurant opened in London. Many British people visited it and said that Chinese food was

wonderful! Suddenly, Chinese restaurants and take-aways started opening in every part of the city.

Instead of too little work, the new Chinese immigrants now found that they had too much! They worked

as cooks, managers or waiters. Most of them enjoyed their lives and arranged their friends and relatives

to join them from overseas.

      As time went by, London's Chinese community became more and more successful. The sons and

daughters of the original restaurant workers studied and worked very hard. And most went on to get

highly paid jobs. Many Chinese families left Chinatown and moved to the more expensive outskirts.

Chinatown, however, is still as lively as ever.

1. When did the first Chinese immigrants come to London?

_________________________________________________.

How many Chinese people were there in Britain at the beginning of the 20th century?

__________________________________________________.

3.What happened in London in the 1950s?

__________________________________________________.

4. What did Chinese immigrants come to London to do in the 1950s?

__________________________________________________.

5. Where is London's Chinatown now?

__________________________________________________.

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在汇总记账凭证账务处理程序中,据以登记总分类账的依据是( )。

A.记账凭证

B.科目汇总表

C.试算平衡表

D.汇总记账凭证

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公司《工程项目领导值班巡查有关规定》中值班巡查范围包括哪些?

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