题干

某地每年消耗20万立方米木材,每立方米木材的价格是240 元,为了减少木材消耗,政府决定按t % 征收木材税,这样每年的木材消耗量就减少2.5 t万立方米,为了既减少木材消耗又保证税金收入每年不少于 90万元,则t的范围是
(21)  

A:1,3

B:2,4

C:3,5

D:4,6

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答案(点此获取答案解析)

C

同类题1

阅读下面短文,从短文后各题所给四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑

       On our first anniversary, Jack bought a bottle of Casaque, an expensive cologne(古龙香水)for me. "We agreed to save the money for your postgraduate education", I said somewhat half-heartedly as I took it out from a beautifully-wrapped packet. "I am unable not to give something 1 to the world's most beautiful bride, honey!" I held it to my2, and smelled the most pleasant flavor I could ever3. Looking down at my4blue jeans and ugly, ragged tennis shoes, I wondered if I could ever be worthy of it. But I would 5. I used only a little of it every time 6Jack graduated and our life was financially easier. It's a 7the foolish love of a young husband.

       Then one day three-year-old Jim was sitting on the floor8the empty cologne bottle. His lips wet, he was making a(n) 9face. He drank my10cologne! "Jack, come quick," I cried, "can cologne11my baby? Jim drank the rest of it!" "It's mostly just alcohol, honey," Jack12me. Little Jim was fine, and my concern for my child was13. I now felt 14to see the empty cologne bottle.

      A few weeks later, Jack bought another bottle of my beloved cologne. I 15it as much as I had done to the earlier one. 16, it became three-quarters empty. I thought it best to buy another 17. But the shop assistant told me that there wasn't even a maker of that brand any more.

    Now I only use my special cologne on very important occasions, because there will be18to replace it when these last few precious19are gone. But from the bottom of my heart it's not three-quarters empty but still one-quarter full. Perhaps if I'm very careful, I can 20using it for the rest of my life.

同类题3

阅读下面三部分内容,从各小题所给的四个选项中选出能回答问题所提问题或完成所给句子的最佳答案。

    People are different. So are friends. Some friends are patient and helpful while some friends are cheerful and caring. The following are some kinds of friends. You can read it and find out what kinds of friends you have. This will help you to improve your relationships with them and help you to find new friends.

    Animal Friends

    Many people keep animals as pets at home. It is right to say that animals are wonderful creatures (生物). They can be with you whenever you need them. Some people say they will feel lonely without their pets. Dogs are considered as people's best friends.

    Internet Friends

    The Internet has become a very important part of our lives. It is not only helpful for people to work, but also a good way to make friends. Internet friendship has become more and more popular recently. More and more people begin to make online friends. Online friends are those who know each other through the Internet. They can talk about everything with each other online. Making Internet friends is similar to making pen pals.

    Pen Friends

    Pen friends, also known as pen pals, are quite popular with people who like writing. Pen friendship is mainly developed by writing to each other. It was a popular way of making friends in different parts of the world before the Internet came into being. Mostly, pen friends aim to share different cultures with each other.