某市为鼓励居民节约用水,对自来水用户收费办法调整为:若每户每月不超过12吨,则每

题型:填空题

问题:

某市为鼓励居民节约用水,对自来水用户收费办法调整为:若每户每月不超过12吨,则每吨收取a元;若每户每月超过12吨,超出部分按每吨2a元收取.若小亮家5月份缴纳水费20a元,则小亮家这个月实际用水         吨.

考点:一元一次方程的定义一元一次方程的解法一元一次方程中的待定系数一元一次方程的应用
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《经济日报》报道,走自主创新之路,不仅使吉利迅速在国内市场上站定了脚跟,也使吉利赢得了进军国际市场的机遇。吉利进军国际市场

A.是适应经济全球化趋势的必然选择

B.必将提高其经济效益

C.是迫于加入世界贸易组织的竞争

D.是为了避开国内市场的竞争

题型:填空题

The most frightening words in the English language are, "Our computer is down. " You hear it more and more when you are on business. The other day I was at the airport waiting for a ticket to Washington and the girl in the ticket office said, "I’m sorry, I can’t sell you a ticket. Our computer is down. "

"If your computer is down, just write me out a ticket. "

"I can’t write you out a ticket. The computer is the only one allowed to do so. "

I looked down on the computer and every passenger was just standing there drinking coffee and staring at the black screen. Then I asked her, "What do all you people do"

"We give the computer the information about your trip, and then it tells us whether you can fly with us or not. "

"So when it goes down, you go down with it. "

"That’s good, sir. "

"How long will the computer be down" I wanted to know.

"I have no idea. Sometimes it’s down for 10 minutes, sometimes for two hours. There’s no way we can find out without asking the computer, and since it’s down it won’t answer us. "

After the girl told me they had no backup computer, I said. "Let’s forget the computer. What about your planes They’re still flying, aren’t they"

"I couldn’t tell without asking the computer. "

"Maybe I could just go to the gate and ask the pilot if he’s flying to Washington, " I suggested.

"I wouldn’t know what gate to send you to. Even if the pilot was going to Washington, he couldn’t take you if you didn’t have a ticket. "

"Is there any other airline flying to Washington within the next few hours"

"I wouldn’t know, " she said, pointing at the dark screen. "Only ’IT’ knows. ’It’ can’t tell me. "

By this time there were quite a few people standing in lines. The word soon spread to other travelers that the computer was down. Some people went white, some people started to cry and still others kicked their luggage.

The best title for the article is ()

A. When the Computer Is Down

B. The Most Frightening Words

C. The Computer of the Airport

D. Asking the Computer

题型:填空题

在经济发展过程中,( )是重要的先决条件。

A.财政收入增长

B.财政结余增长

C.财政支出下降

D.财政支出增长

题型:填空题

我国境内已知的最早人类是元谋人。( )

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计算题:有一铜套,外径为6cm,内径为5cm,长度为4cm,密度为8.5g/cm;试求其体积和质量(精确到0.01cm和1g)。

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