可逆反应N2+3H22NH3 △H<0,达到平衡后,为使H2的转化率增大,下列说

题型:选择题

问题:

可逆反应N2+3H22NH3 △H<0,达到平衡后,为使H2的转化率增大,下列说法正确的是(  )

A.升高温度,降低压强,增加氮气

B.降低温度,增大压强,加入催化剂

C.升高温度,增大压强,增加氮气

D.降低温度,增大压强,分离部分氨

考点:化学平衡的有关计算影响化学平衡的因素达到化学平衡的标志化学平衡常数
题型:选择题

阅读理解。

     Today Newtown is a very clean place. Many years ago, however, there were millions of rats (老鼠) in

 Newtown. They attacked the cats and dogs.

     Sometimes a great number of them knocked down a man or woman walking home at night. The rats

 were very large and they harmed many people.

     The Government ( 政府) ordered everybody to kill rats. Most people were very lazy, so they did not

 kill them. Then the Government promised to pay some money for each clead rat. That made people very

 happy. A Government officer put all the dead rats in a big pile. Sometimes a man brought hundreds in a

 day.

     After two weeks there were not many rats in the city, but people still brought rats to the Government

 officer.  The Government officer thought that people were stealing dead rats from the pile. He ordered his

  men to dig a deep hole and put the rats in it. Soon there were no more rats, and the Government did not 

 pay any more money.

1. The underlined phrase "a great number of" means

    A. a great deal      

    B. a good many of

    C. a great amount of

    D. a good much of

2. According to (根据) the passage, which of the following is TRUE?

    A. In Newtown, anyone who was riding home at night could be knocked down by rats.

    B. In Newtown, anyone who was at home at night could be knocked down by rats.

    C. In Newtown, anyone who was going home on foot at night could be knocked down by rats.

    D. No matter when the people in Newtown were walking home, they could be knocked down

        by rats.

3. Why were the people stealing the rats from the pile'?

    A. Because they thought the dead rats should be put in a deep hole.

    B. Because they thought it was a good way to get more money from the Government.

    C. Because they thought they were not lazy.

    D. Because they thought they were all poor and were forced to do so.

4.  Which of the following is TRUE?

    A. The officer ordered his men to dig a deep hole and put the dead rats in it just only to save money for 

          the Government.

    B. Soon the Government did not pay any more money, and there were no more rats.

    C. The officer wanted to teach the lazy people a lesson, so he ordered his men to put the dead rats in a

         deep hole.

    D. The officer and his men put the dead rats in a deep hole in order to prevent the dead rats from being

          stolen and get rid of all the rats in the city.

5. The best title for this passage should be_____.

    A. How Newtown Became a Very Clean Place

    B. How the People in Newtown Became Rich

    C. How to Kill Rats in a City

    D. Newtown-A Rat City

题型:选择题

济南市民贾女土发现在超市购买的一瓶香油味道有异常,但是产品未过保质期。超市工作人员认为香油无质量问题,除非贾女士拿出合法的质量检测报告才肯退货。于是,贾女士找到了济南质监局食品中心,对方告诉她,检测费要花几百元。贾女士说,这瓶香油价值13.5元,可检测费就要几百元,再加上送检所耗费的路费、时间、精力,实在是用不偿失。为此,贾女士只好把剩下的香油扔进垃圾箱,不再继续投诉了。 根据本文,理解正确的是( )。

A.香油没有明确的保质期

B.日用商品的投诉成本太高

C.普通消费者不会书写诉状

D.贾女士投诉没有找对机构

题型:选择题

桶盖领用时首先应检查()与使用要求是否相符。

A、规格

B、数量

C、库存

D、生产日期

题型:选择题

电力部焊工考规规定,手工电弧焊焊工应按酸性焊条、碱性焊条分别进行操作技能考核,且不能互相代替()

题型:选择题

梁的平法标注中,部分标注为KL3(2A)300x650,则以下关于该梁的说法中错误的是()。

A.两跨一端悬挑

B.两跨两端悬挑

C.梁的截面尺寸为300x650

D.梁的编号为3

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