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问题 解答题

被减式是3x2-2x+1，差是4x2+7x-6，求减式是多少？

答案

减式=（3x2-2x+1）-（4x2+7x-6）

=3x2-2x+1-4x2-7x+6

=-x2-9x+7．

选择题

— The social worker spent nearly two hours __________ the plan. He said he would discuss with you about it these two days.

— Really? __________ is fine.

A．to look through; Some time

B．to look for; Any time

C．looking at; Some time

D．looking through; Any time
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单项选择题

我们上网时，输入的网络地址前都写有“www”，它是WorldWideWeb的英文缩写，你知道它的中文名字叫什么吗？（）

A.万象网

B.万维网

C.万奇网

D.因特网
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