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Do you like bananas? They taste good and...

    Do you like bananas? They taste good and you can have them without washing. However, British scientists say that the fruit may die out by 2050.

One reason for this is climate change. Scientists at the University of Exeter collected data(数据)from 27 countries that produce 86% of the world's bananas. They found that climate change made people harvest more bananas.

However, if temperatures keep going higher, this advantage will disappear. Some countries, like India, the world's biggest producer of bananas, will produce(生产)fewer bananas. By 2050, the fruit may die out.

Shouldn't bananas grow more easily if it's hotter outside? In fact, the perfect temperature for growing bananas is between 24 and 32. If temperatures get too high, they will stop growing.

Diseases are another danger to bananas. Unlike other crops, all banana plants have the same genotype(基因型). In other words, if a disease is able to kill one plant, it could kill them all.

One serious disease is called Panama. It spreads easily. It has spread across South Asia, Africa, Middle East, and Australia. If one banana plantation(种植园)develop the disease, it will take 30 years until it is able to grow bananas again. Scientists haven't found a good way to deal with this disease till now.

1.If temperatures keep going higher, maybe _____________________.

A.more countries will begin to grow bananas B.bananas will harvest better in most countries

C.there won't be any bananas in the future D.bananas will be more delicious than before

2.What does the underlined word "this" in Paragraph 2refer to(指的是)?

A.The taste of bananas. B.People's love for bananas

C.The dying out of bananas in the future. D.The advantages of eating bananas.

3.What's the perfect temperature for growing bananas?

A.24 and31. B.24 and 32. C.24 and 33. D.24 and 34

4.The purpose(意图)of this story is to ________________.

A.give some advice on growing bananas B.tell us why bananas may die out

C.show how hard to grow bananas D.tell us the environment of bananas' growing

 

1.C 2.C 3.B 4.B 【解析】 本文是一篇说明文,主要介绍了香蕉可能会在2025年灭绝,并具体说明了导致这一现象的原因,分别是温度过高以及疾病。 1.细节理解题。根据第三段“if temperatures keep going higher, this advantage will disappear…By 2050, the fruit may die out”可知,如果温度继续升高,未来将不再会有香蕉。故选C。 2.推理判断题。根据第一段“British scientists say that the fruit may die out by 2050”可知,此处的this指代的是香蕉会在未来灭绝的现象。故选C。 3.细节理解题。根据第四段“In fact, the perfect temperature for growing bananas is between 24℃ and 32℃”可知,种植香蕉的最佳温度在24℃到32℃之间。故选B。 4.主旨大意题。根据“One reason for this is climate change…Diseases are another danger to bananas”及全文内容可知,本文主要向我们介绍未来香蕉灭绝的原因,分别是气候和疾病。故选B。
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