若m-n=2，mn=1，则多项式（-2mn+2m+3n）-（3mn+2n-2m）_爱下问搜题

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问题填空题

若m-n=2，mn=1，则多项式（-2mn+2m+3n）-（3mn+2n-2m）-（m+4n+mn）的值是______．

答案

原式=-2mn+2m+3n-3mn-2n+2m-m-4n-mn

=3（m-n）-6mn

=3×2-6×1

=0．

问答题

雄黄解毒丸功效与作用

补全对话，情景问答

A. Fine weather, isn't it?
B. How far is it from here?
C. I think it can help me relax.
D. What kind of music do you like?
E. When and where shall we meet?
F. I like listening to some rock music.
G. Why don’t we go out for a picnic tomorrow?

A: Weather report says that it will be sunny tomorrow. (1) ___________
B: A picnic? Sounds great! But where will we go?
A: Let's go to the newly-built park. OK?
B: (2) ___________
A: It's only ten minutes' walk from here.
B: Great. I'll take my CD player besides some food.
A: (3) ___________
B: Light music. (4) ___________ Would you like to have a try?
A: Sure.
B: Then I will bring many CDs for you tomorrow. (5) ___________
A: How about seven o'clock at the gate of Bank of China?
B: OK. See you then.
A: See you.