问题 单项选择题 A1/A2型题

用于乙脑病毒的分离和培养的细胞是()。

A.MA104

B.MDCK

C.C6/36

D.HeLa

E.Hep-2

答案

参考答案:C

解析:对乙脑病毒敏感的细胞有:地鼠肾、猪肾和鸡胚等原代细胞,Vero、C6/36等传代细胞。目前分离登革热病毒最常用的细胞也是C6/36细胞。

阅读理解

阅读理解。

      Mr Young worked in a factory.  He was an able (有能力的) worker and could get more money than

  his workmates.  His wife was able,  too.  She did all the housework and took good care of her

 children.  They were never worried about food or clothes.  But they were both miserly (吝啬) and tried to

  save everything.  Their family wore old and broken clothes.  He always went to work and their children

  went to school on foot.

    One afternoon, while Mrs Young was cooking supper, she heard the bell.  A man said on the

 telephone,  "I'm sorry to tell you something unlucky.  Your husband died in an accident. "

    The woman hardly believed her ears.  "When did it happen?" she shouted sadly.  "At four, Mrs Young. "

    "It's half past five!" the woman said angrily.  "Why didn't you tell me about it an hour ago? I've cooked

 supper for him ! "

     "Everything was confused (混乱的) here at that moment and all of us forgot it. "

     "What were his last words? "

     "He asked us to retell you he wouldn't go back for supper!"

1. Mr Young was able, so_____.

    A.  he wore old clothes            

    B.  he spend twenty to work on foot

    C.  he lived a happy life          

    D.  he got more money

2. Mr Young's children went to school on foot because_____.

    A.  they were poor

    B.  his parents tried to save money

    C.  there were no buses in the town

    D. they hoped to do morning exercises

3. Mrs Young began to cook supper at_____.

    A.  four      

    B.  half past four      

    C.  five      

    D.  half past five

4. The phrase "last words " in the story means_________.

    A. 最后一些词语            

    B. 最后一些话

   C. 遗言                    

    D. 嘱托

5. Mrs Young became angry because          .

    A. she wasn't told about the bad news before she cooked supper.

    B.  the factory didn't retell her husband's last words in time.

    C.  she couldn't see her husband before he died.

    D.  she didn't know whether her husband's last words were real.

问答题 案例分析题

材料一:在(公元)1500年以前,阿拉伯和意大利商人在亚欧大陆上从一个地区运货到另一个地区,而货物主要是奢侈品、香料、丝绸、宝石和香水。但是到18世纪后期新世界的种植场生产的大量砂糖、咖啡及棉花等大部分运往欧洲出售;西班牙人也向新世界引进欧洲各种水果,如橄榄以及葡萄。美洲的特产也被流向世界各地,如玉米、马铃薯、西红柿、番薯、花生、各种豆类及南瓜、可可等。

材料二:火车、轮船、电报等新式交通工具和电讯器材的出现,把世界各地紧密结合在一起。十九世纪上半期,一个英国人描述道:印度给我们运来他们种植的棉花,……我们熟练的机械工和技术工人制造必要的机器,用这些原料制成精美的布匹,销往各国。所有的布匹都按我们的款式制造,并使之符合人们的需要。我们的船只满载着原料归来,又将满载着制成品返回地球各个角落。20世纪初,又有英国人描绘说:英国伦敦的居民可以打电话订购世界上的任何产品,也可以把自己的财富投资到地球任何角落的自然资源的开发和新的冒险事业中。

材料三:如果我们想使和平的努力达到同我们战争的努力达到同我们战争的努力一样的水平;我们必须把和平的机构坚实地放在国际政治和经济合作的牢固的基础之上。……然而,只有我们今天面临的棘手的经济问题找到解决办法时,才能建立起友好的和建设性的国际关系。

——1945年罗斯福总统要求国会批准《布雷顿森林协定》的咨文

根据材料一反映,从16—18世纪,世界发生了哪些变化?简要分析产生这种变化的原因。