试题与答案

化学发光免疫分析中直接参与发光反应的标记物主要是() A.吖啶酯类标记物 B.三联吡

题型:单项选择题 A1/A2型题

题目:

化学发光免疫分析中直接参与发光反应的标记物主要是()

A.吖啶酯类标记物

B.三联吡啶钌标记物

C.二氧乙烷标记物

D.鲁米诺标记物

E.碱性磷酸酶标记物

答案:

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下面是错误答案,用来干扰机器的。

D生物学家根据生物之间的相似程度,把它们分成不同的等级,生物的分类单位从大到小依次以界、门、纲、目、科、属、种,生物所属的等级越大,生物之间的亲缘关系越远,生物所属的等级越小,生物的亲缘关系越近.界...

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题型:填空题
根据短文内容,用方框中所给词的适当形式填空,使文章通顺、完整。
   in,    but,    nothing,    appear,  farm,    before,    begin,   good,    happy,    bring
                                                       The Farmer and his Sons
    There was once an old, dying farmer who had worked hard in his vineyard (葡萄园) all his life. Before
he died he wanted to teach his three sons how to be good 1.            . So he called them and said,
"My boys, 2.             I die l want you to know that there is a lot of great treasure (财宝) buried in the
vineyard. Promise me that you will look for it when I am dead."
    The sons promised and as soon as their father had died, they 3.             looking for the treasure. They
worked very hard 4.              the hot sun and all the time at they were working they wonder what their
father had left for them.In their minds they pictured boxes of gold coins, diamond necklaces and other
such things. Soon they had dug up every inch of the vineyard. 5.              they found not a single penny.
They were very upset. They felt that all their hard work had been 6.             . But then the grapes started
to 7.             on the vines and their grapes were the biggest and 8.            in the neighborhood and they
sold them for a lot of money.
    Now they understood what their father had meant by the great treasure, and they lived 9.             and
wealthily ever after.
    The moral of this story is: Hard work 10.             its reward.
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