Farmers can produce more by planting several different crops in the same field.But their success depends on which crops they plant together and how they mix them in the filed.In the past, the only way 题目和参考答案——青夏教育精英家教网—

题目内容

Farmers can produce more by planting several different crops in the same field.But their success depends on which crops they plant together and how they mix (混合) them in the filed.In the past, the only way the farmers could learn which crops grow best together is to plant them and wait for the results.Now, however, a computer can give them answers.A new computer program written by Dr John Vanderwell of Michigan University can tell a farmer which plants grow well together and which do not.It can tell him how to plant the different crops; if he should plant each in a separate row, or mix the crops in the same row.It can tell the farmer how changes in planting each of the crops will affect the production of all of them.And it can tell him which plants can help reduce losses (损失) from diseases.

1.Which of the following best gives the main idea of the passage?

A．Computer helps find the best program for mixing plants.

B．Computer helps produce more crops.

C．Computer helps protect against insects and diseases.

D．Computer helps grow different plants.

2.According to the passage, to get the best result, one needs to choose carefully ________.

A．the kinds of crops to be planted together

B．the way for different crops to be mixed

C．both A and B

D．either A or B

3.It seems the new computer program can NOT tell us ________.

A．whether we should grow cotton and tomato together

B．how we should plant cotton and tomato together

C．what will happen if we grow potato, instead of tomato, together with cotton

D．how we can grow rice in the tomato field

4.The new computer program seems most useful in saving us ________.

A．man power B．seeds C．time D．land

5.Which of the following is NOT true?

A．Computers can tell farmers how many plants can grow together.

B．With the help of computers farmers don't have to do a lot of work.

C．With the help of computers farmers can get better results.

D．The change of one plant may cause a change in production.

【答案】

1.B

2.C

3.D

4.D

5.B

【解析】

试题分析：文章介绍了一种新的电脑程序，可以告诉农民怎样在同一块土地上种更多的庄稼，可以节省土地。

1.主旨题：从文章的句子：A new computer program written by Dr John Vanderwell of Michigan University can tell a farmer which plants grow well together and which do not.可知这篇文章介绍一种电脑程序，可以知道什么庄稼在一起种最好。选B

2.细节题：从文章的句子：But their success depends on which crops they plant together and how they mix (混合) them in the filed.可知成功与否取决于什么庄稼在一起长比较好，怎么长。选C

3.细节题：从文章的句子：which plants grow well together and which do not.可知A正确，how to plant the different crops; 可知B正确，从It can tell the farmer how changes in planting each of the crops will affect the production of all of them.可知C是对的，没有提到可以在西红柿田里种水稻。选D

4.细节题：从第一句话：Farmers can produce more by planting several different crops in the same field.可知这种方法可以在同一块土地上种更多的庄稼，就是节省土地。选D

5.排除题：新的方法只是让人们在同一块土地上种更多的庄稼，就是节省土地。但不能节省劳力。选B

考点：考查科普类短文

点评：本文要求考生读懂文章中的每个句子的意思还要推理它们之间的关系，结合自己的生活常识和经验，再通过逻辑推理和判断，理解文章的言外之意，从而揭示文章的深层涵义。任何一篇文章都有其特定的写作目的，读者应当知道如何去做或按照某种方式传递思考问题。推理判断题的答案不可能在文章中直接找到，因此推理时我们务必要忠于原文，在文章中寻找并确定可推论的依据。

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