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问题 填空题
不等式
2a-x
x-a2-1
＞0（a≠1）的解集为______．
答案

∵不等式

2a-x
x-a2-1
＞0（a≠1）

∴

x-2a
x-a2-1
＜0可得（x-2a）[x-（a2+1）]＜0且x≠a2+1，

又a2+1-2a=（a-1）2≥0，因为a≠1，（a-1）2＞0，即a2+1＞2a，

解不等式得，2a＜x＜a2+1，

故答案为（2a，a2+1）；

单项选择题

牙刷的正确保管措施，不包括哪一项（）

A.每人一把，防止交叉感染

B.不能高温消毒

C.用完后清水冲刷几次，甩干水分

D.不用时放在牙刷盒里

E.3个月更换一把
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单项选择题

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 (71) , and that it has a mechanism for (72) graphical files. Display text, display graphics, and (73) hypefiinks, there’s 99 percent of the (74) 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 (75) for application development Remember frames and all their nasty side effects

A．displaying

B．illustrating

C．drawing

D．writing
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