买5本故事书共付X元,每本故事书的单价是______元;每本科技书Y元,每本故事

题型:填空题

问题:

买5本故事书共付X元,每本故事书的单价是______元;每本科技书Y元,每本故事书的单价比每本科技书多______元.

考点:用字母表示数
题型:填空题

A businessman lost his wallet. There was plenty of money in it. So he makes a promise(诺言), “If someone finds my wallet and returns it to me, I'll give half the money to him.” A dustman(清洁工) found the wallet in a dustbin(垃圾箱). He sent it back to the loser. But the businessman changed his mind.

“There was still a diamond ring(钻戒) in my wallet,” said the loser. “I won't give half the money in my wallet to you before you return it to me!”

“I've never seen a diamond ring in the wallet,” said the dustman.

They began to quarrel. The businessman didn’t do what he had said. The dustman became angry and took him before a judge (法官).

After the judge heard what had happened to them, he said to the businessman, “I'm sure you are an honest man. It's true that you have lost a wallet in which there was a diamond ring. But it's also clear that there is only a lot of money in this wallet. I don't think it's yours. Wait for some time. Perhaps someone will be able to return your wallet to you!”

Then the judge turned to the dustman and said, “Take the wallet home. If the loser doesn't go to get it back in three days, it will belong to you!”

小题1:The wallet the businessman lost __________.

A.was found in a shop

B.was sent to the judge

C.was found in a dustbin

D.was never to be found小题2: The businessman was eager (渴望) to get back the wallet because __________.

A.there was the address of an important judge in it

B.there was a lot of money in it

C.he put in it a diamond ring he had just bought

D.it was a very expensive one小题3: Which of the following is true according to the story?

A.The businessman broke his promise.

B.The dustman asked the businessman to give him more money.

C.They began to quarrel because the wallet got dirty.

D.The dustman kept the diamond ring for himself.小题4: Having heard what had happened, the judge ________.

A.took the side of the businessman

B.made a wise(明智的) decision

C.took pity on the loser

D.didn't know what to do小题5: Where do you think the diamond ring was?

A.The businessman hid it.

B.The dustman kept it.

C.The judge stole it.

D.The story of the ring was nothing but a lie.

题型:填空题

若一元二次方程x2-ax-2a=0的两根之和为4a-3,则两根之积为(  )

A.2

B.-2

C.-6或2

D.6或-2

题型:填空题

臭氧层是地球的保护伞。若臭氧层臭氧的浓度减少使达到地表的太阳辐射B种紫外线(UV-B)增加,则会对人类和生态系统产生下列不利影响:(),(),(),()和()。

题型:填空题

“透视”(Perspective)一词的含义,就是透过立体面来观看景物,从而研究他们的形状的意思。( )

题型:填空题

()是发挥工作主动性创造性的可靠保证。

A.党的宗旨

B.党的性质

C.党的纪律

D.党的纲领

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