问题 单项选择题 A1/A2型题

双抗体夹心ELISA法是检测()。

A.抗体最常用的方法

B.抗原最常用的方法

C.至少含有两个抗原决定簇的多价抗体的方法

D.至少含有1个抗原决定簇的多价抗原的方法

E.至少含有1个抗原决定簇的单价抗原的方法

答案

参考答案:B

解析:双抗体夹心ELISA法是将特异性抗体与固相载体连接,形成固相抗体,然后加入受检标本,使之与固相抗体接触反应,形成固相抗原抗体复合物,再加入酶标抗体,使固相免疫复合物上的抗原与酶标抗体结合,根据底物颜色反应的程度进行抗原的定性或定量的免疫学方法。

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Rockwatch—The Best Club on Earth

If you are young and interested in geology(地质学), then Rockwatch is the club for you. When you apply for membership, you'll receive a Rockwatch Rox file each. It has the information and top tips you will need to start enjoying geology. It's designed to serve as your own field notebook as well.

In it you will find your

·membership card

·full­colour minimap

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With each magazine you will receive a Rockwatch events calendar. Rocky activities suitable for families are listed and include road shows and guided walks.

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小题1:Rockwatch Magazine mailed to its members tells about things related to ________.

A.geology

B.agriculture

C.politics

D.economics小题2:What activities are specially arranged for Rockwatch members interested in photography?

A.Guided walks.

B.Rocky activities.

C.Yearly competitions.

D.Academic workshops.小题3:When applying for Wildlife Watch membership, a Rockwatch member can enjoy ________.

A.free membership

B.a special discount

C.a Rock Artist prize

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A.calling the two clubs

B.providing references

C.applying separately

D.filling in one form

单项选择题