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London-is such a wonderful city.It is very large.The Thames River runs (11) the city from west to east. So the city has (12) parts: the South and the North. In the North, there are important buildings, shops, big parks and interesting places. the weather

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London-is such a wonderful city.It is very large.The Thames River runs (11) the city from west to east. So the city has (12) parts: the South and the North. In the North, there are important buildings, shops, big parks and interesting places. the weather in London is good. In winter it is not very cold and in summer it is not very hot (13) the city is near the sea. People say (14 ) London is a foggy city and it often rains. It is true.Last year,when l (15) in London, Imet one of the (16) fogs in years. You could hardly see your hands in front of your face. Cars and buses moved -along with their lights on.When evening fell, the weather (17 ) even worse. The fog was as thick as milk.(18) the buses and cars stopped. I happened (19 ) . an important meeting on the other side of the town, but it was impossible to find a car. I had to get there (20) .

( )11.

A.about

B.through

C.in

D.along


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  • 第1题:

    The workers were resting with the machine ________.

    A、run

    B、running

    C、to run

    D、runs


    参考答案:B

  • 第2题:

    关系模式CSZ(CITY,ST,ZIP)其属性组上的函数依赖集为F={(CITY,ST)+ZIP, ZIP→CITY},关系模式CSZ的主属性是

    A.ZIP

    B.CITY,ST,ZIP

    C.CITY,ZIP

    D.ST,ZIP


    正确答案:B
    解析:包含在任何一个候选码中的属性叫做主属性。在这道题中全部属性都是主属性。

  • 第3题:

    The information commissioner gave Facebook a rap over the knuckles earlier this month,putting the company on notice of likely fines-the equivalent of a few minutes'revenue-for breaches of privacy.On Wednesday the European commission gave Google a vigorous correction,fining it¢4.3 billion for abusing its market dominance with the AndrOJd operating system which powers the overwhelming majority of the world's mobile phones.Google is appealing.The billions of euros at stake aside,it is easy to see why.Google gives most of Android away,not only to the consumers who use it,but to the companies that build their phones around it.As the company points out,there are more than 24,000 competing Android phones available today,from 1,300 companies.How can that possibly constitute a harmful monopoly?Besides,Google has real competition in the smartphone world from Apple.At the same time,these are exactly the factors that make the commission's decision so interesLing and significant.For Google's business to work,it must become as easy as possible for advertisers to reach users.That is the purpose of all the software that Google gives away,from the Android operating system,through to YouTube,Google search on phones and the Chrome browser.This might look like a cross-subsidy,but on the other hand it is the heart of the company's business.The software that Google gives away is not designed to make a profit on its own.This free version does not include the bits that make a phone useful for anything but making telephone calls,and this was the weak spot in Google's defence.None of the enticements-the mail,the search,the maps and the browser-are included.These can only be used with a proprietary chunk of software that Google controls;and manufacturers who want to use the Play store and 11 crucial Google apps must agree not to build so much as a single phone that does not include them.It is all or nothing.This licensing trick is the way in which Google has undoubtedly limited competition.The commission's decision to punish it probably comes too late to undo the damage it has done.All digital businesses tend towards a monopoly,and this is in part because in some important ways they benefit consumers more the larger they grow.Yet as customers we pay for this in other ways and as citizens even more so,not least because the companies fattened by monopoly profits grow too large to fail and too powerful to challenge.There is a public interest in preventing any company from acquiring almost unlimited power.Regulation defends democracy.
    The phrase"a rap over the knuckles"(I.ine l.Para.1)is closest in meaning to

    A.a not-very-severe punishment.
    B.a nol-very-correci explanaiion.
    C.a heavy fine.
    D.a false charge.

    答案:A
    解析:
    第一段①②句结构均为“主干十伴随状语”,主干中的关键信息可依靠起补充说明作用的状语推出。①句状语指出;信息专员警告脸书因侵犯隐私可能面临罚款(likely fines)(暗含“罚单实际并未开出”之意);②句通过具体罚款数额介绍谷歌被严惩(a vigorous correction)的事实。结合两句可推知脸书受到处罚比谷歌轻,且实际并未被开出罚单.A.a not-very-severe punishment最为接近所考词a rap over the knuckles的含义。[解题技巧]B.按字面意思理解②句的correction,并错误推导出①句是“委员作出了不太正确的解释”.②句是“委员会提出了修正”。但两句话涉及的对象并非同一家公司,照此理解不合逻辑。C.源自②句“罚款43亿欧元”,但这是对谷歌而非脸书的处罚。D.同样曲解了correction的含义,臆断出处罚谷歌”正确”,指控脸书“错误”。注:文中correction为熟词辟义,意为“处罚,惩罚”,根据上下文可推知此义。

  • 第4题:

    检索有职工的基本工资大于或等于“11”部门中任意一名职工工资的“部门号”,正确的命令是,( )。

    A.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ANY; (SELECT 基本工资 FROM 职工 WHERE 部门号="11")

    B.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ALL; (SELECT 基本工资 FROM 职工 WHERE 部门号="11")

    C.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ANY; (SELECT MAX(基本工资) FROM 职工 WHERE 部门号="11")

    D.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ALL; (SELECT MIN(基本工资) FROM 职工 WHERE 部门号="11")


    正确答案:B
    解析:在SQL语句中可以利用ANY、ALL等量词进行查询。基本格式为:
    表达式>比较运算符>[ANY|ALL|SOME](子查询)
    其中,ANY(任意的)和SOME(一些)表示只要子查询中存在符合条件的行,结果就成立;而ALL(所有的)只有子查询中的所有的行都符合条件,结果才成立。
    本题中要求检索有职工的基本工资大于或等于“11”部门中任意一名职工的工资的部门号,等价于其他部门职工的基本工资有大于或等于“11”部门中所有职工的工资,因此要使用ALL短语。选项C)和D)的属于语法错误,SQL不支持此类型查询。

  • 第5题:

    关系模式CSZ(CITY,ST,ZIP)其属性组上的函数依赖集为F={(CITY,ST)→ZIP, P→CITY},关系模式CSZ的主属性是

    A.ZIP

    B.CITY,ST,ZIP

    C.CITY,ZIP

    D.ST,ZIP


    正确答案:B
    解析:包含在任何一个候选码中的属性叫做主属性。在这道题中全部属性都是主属性。

  • 第6题:

    有如下的数据表: 部门(部门号, 部门名称) 职工(部门号, 职工号, 姓名, 基本工资) 检索有职工的基本工资大于或等于“11”部门中任意一名职工工资的“部门号”,正确的语句是______。

    A.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ANY (SELECT 基本工资 FROM 职工 WHERE 部门号='11')

    B.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ALL (SELECT 基本工资 FROM 职工 WHERE 部门号='11')

    C.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ANY (SELECT MAX(基本工资) FROM 职工 WHERE 部门号='11')

    D.SELECT DISTINCT 部门号 FROM 职工 WHERE 基本工资>=ALL (SELECT MIN(基本工资) FROM 职工 WHERE 部门号='11')


    C C。【解析】本题考查了SQL语句的功能。目的是在商品表中按部门号进行分组,分组后从每个组中查询出单价和数量乘积最大的记录。