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问题 单项选择题 A1/A2型题

下列关于抗原抗体反应中电解质的作用说法错误的是（）

A.进一步使抗原抗体复合物表面失去电荷

B.破坏水化层

C.使复合物相互靠拢、聚集

D.便于形成大块凝集、沉淀

E.使抗原抗体复合物表面电荷增多

答案

参考答案：E

填空题
方程组
x+y=3
x-y=3
的解是______．
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单项选择题

A Web browser is simply a terminal emulator, designed to display text on a screen. The two essential differences between an ordinary terminal emulator and a Web browser are that the browser knows how to deal with （1）, and that it has a mechanism for（2） graphical files. Display text, display graphics, and （3） hyperlinks--there’s 99 percent of the （4） value. That’s not to say that the manufacturers didn’t go all-out to attach a hyperactive efflorescence of useless capabilities onto their browsers. Remember when media channels in the browser were a big deal, instead of the clutter you can’t wait to delete from your favorites of bookmarks menu Remember when client-side Java applets were supposed to become the preferred（5）for application development Remember frames and all their nasty side effects

（5）是（）

A.plane

B.plant

C.plate

D.platform
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