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    题目列表(包括答案和解析)

    (10分)已知实数满足
    求（1）的最大值。
    （2）的最小值。

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    (10分)据报道：2011年12月31日深圳宝安沙井39岁患者陈某某，被诊断为人感染高致病性禽流感（H5N1）而引发的多脏器衰竭而死亡。禽流感再一次又引起了人们的高度关注。右图是高致病性禽流感病毒H5N1侵入人体后发生免疫反应的图解，图中A、B、C为有关的物质或结构。请据图回答问题：

    （1）物质B的化学本质是 ______________。
    （2）物质A为____________，是由效应T细胞分泌，又能诱导生成更多的效应_________ 细胞，这是一种____________调节机制。  
    （3）效应T细胞与靶细胞密切接触，激活靶细胞内的_____________，并使其通透性、渗透压发生改变，最终___________，释放出病毒与抗体结合，使病毒失去_________________________宿主细胞的能力。
    （4）T细胞由__________分化而来,成熟于______________，并随血液和淋巴在体内流动。T细胞在人体免疫应答中除具有图示增殖分化的功能外，还能 ______________。

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    10% Off
    Show this voucher（优惠券）at the Book Store to get a 10% discount(减价) on any books you buy. We have lots of books to choose from, including children’s books, novels, travel guides and hobbies. You’re sure to find something that you will enjoy.
    Assistant Wanted
    For a busy restaurant work on weekends. All meals are free. Call at 4323577 for more information.
    Lost Cat
    Help me find my pet cat! She is 4 years old. She has long white hair and a long tail. Her name is Cathy. Call Carrie at 2853527.
    【小题1】If Mary wants to be an assistant, she can phone the number______.
    A．2853527B．4323577 C．4332577D．2835527
    【小题2】You can get a 10% discount on any books if you ____at the Book Store.
    A．show this voucherB．buy some tickets C．buy some giftsD．buy some books
    【小题3】There are several kinds of books on sale except______.
    A．children’s booksB．travel guides C．magazinesD．novels
    【小题4】______lost the white cat.
    A．CathyB．The assistant C．CarrieD．Mary
    【小题5】The assistant has lunch at the restaurant, she should______. 
    A．call 2853527B．call 4323577 C．work on MondayD．pay nothing

    查看答案和解析>>

     

    10% Off

    Show this voucher（优惠券）at the Book Store to get a 10% discount(减价) on any books you buy. We have lots of books to choose from, including children’s books, novels, travel guides and hobbies. You’re sure to find something that you will enjoy.

    Assistant Wanted

    For a busy restaurant work on weekends. All meals are free. Call at 4323577 for more information.

    Lost Cat

    Help me find my pet cat! She is 4 years old. She has long white hair and a long tail. Her name is Cathy. Call Carrie at 2853527.

    1.If Mary wants to be an assistant, she can phone the number______.

    A．2853527

    B．4323577

    C．4332577

    D．2835527

    2.You can get a 10% discount on any books if you ____at the Book Store.

    A．show this voucher

    B．buy some tickets

    C．buy some gifts

    D．buy some books

    3.There are several kinds of books on sale except______.

    A．children’s books

    B．travel guides

    C．magazines

    D．novels

    4.______lost the white cat.

    A．Cathy

    B．The assistant

    C．Carrie

    D．Mary

    5.The assistant has lunch at the restaurant, she should______. 

    A．call 2853527

    B．call 4323577

    C．work on Monday

    D．pay nothing

     

    查看答案和解析>>

    10 years ago， _________ only one classroom building in our school. And in 10 years， _________ five classroom buildings in our school.

    A．there will be, there are

    B．there was, there will be

    C．there will be; there was

    D．there was, there are

     

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