方程4x2x-1=2x+1x-2的解是______．_爱下问搜题

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问题填空题

方程

4x

2x-1

=

2x+1

x-2

的解是______．

答案

方程的两边同乘（2x-1）（x-2），得

4x（x-2）=（2x+1）（2x-1），

解得x=

1

8

．

检验：把x=

1

8

代入（2x-1）（x-2）≠0．

∴原方程的解为：x=

1

8

．

故答案为：x=

1

8

．

完形填空

根据对话内容，从对话后的选项中选出能填入空白处的最佳选项，选项中有两项多余选项。（共5小题；每小题 2分，满分10分）
—Welcome to our interview, Mr. Smith.
— 小题1:
—So, you're an Australian theater actor, but you've just come back from making a film in Los Angeles.
—That's right.
— 小题2:
—Well, I was working in a play in Sydney and the director of the film came to see it. Actually, she came to see another actor in the play.
—I see. And then what happened?
—小题3:
—I see. But how about you?
—And my dressing room was next to his, so after she'd talked to him, she talked to me.
—And what did she say to you?
—She said, "Why don't you fly to Los Angeles and we'll give you a screen test. '
—小题4:
—I said, "Yes, of course!" So I went to Los Angeles and did a screen test. The

n I flew back to Sydney and carried on with the play.
— 小题5:
—When she rang, I was sleeping. Anyway, I stopped doing the play and flew to Los Angeles again.

A．How did you get the part?

B．And what did you say to her?

C．What role did you play in the film?

D．She asked if I'd like to play a part.

E. Oh, thanks. It's very nice to be here.
F. What were you doing when you heard you had got the part?
G. She talked to another actor at the end of the play.

填空题

无论是大树还是小草，构成他们的基本单位是______．