【題目】Coral reefs(珊 瑚 礁)are not just beautiful to look at，but also very useful．They shelter nearly 25％ of ocean life and provide food for billions of people．However, like many other species，this amazing ecosystem(生態(tài)系統(tǒng))is in danger of dying out!

There are two main reasons for the destruction—the rising carbon dioxide levels caused by global warming as well as human influences like bottom operation．While not much can be done about the former，the loss caused by the latter can be reduced．

Bottom operation involves dropping nets to the ocean bed and then dragging them up when filled with fish．This action damaged the ocean floor，causing the coral branches to separate from the reefs．While that is very discouraging，the good news is that if these branches are found quickly，they can be saved．At present，that work is being performed by volunteer divers. But the method has only limited success because they cannot stay long underwater, nor reach depths of over 200 meters where some of the deep-sea coral grows．

However，this is not the case for Coral bots—the robots that can constantly seek out broken branches．A team of ‘coral bots’，each individually working to simple rules will piece together’ damaged bits of coral, allowing them to regrow. They are programmed to be able to distinguish between other things and the coral．The robots work together in groups，similar to bees．If one coralbot is damaged then the others will still be able to complete the task．

Dr Lea-Anne Henry said：“The project of using coral bots offers us the possibility to restore(修復(fù))the function of reefs．It is in the final stage of testing．Once ready, the researchers hope to build hundreds of them and use them effectively in the waters off Scotland and then hopefully in the oceans across the world．”

【1】Which of the following is a cause of the danger that coral reefs are facing?

A．The appearance of new creatures．

B．The seriously polluted sea water．

C．The activities of volunteer divers．

D．Human activities like bottom operation．

【2】Compared with volunteer divers，coralbots ______________．

A．can stay longer underwater

B．must work as bees do

C．can distinguish what is coral

D．can never be damaged

【3】What does the underlined word“them”in the last paragraph refer to?

A．Coralbots． B．Broken branches．

C．working bees． D．Bits of coral．

【4】We can infer from the passage that _______________．

A．bottom operation has affected most underwater creatures

B．broken branches of coral can regrow if saved in time

C．hundreds of the coralbots have worked well in the oceans

D．with the coralbots all damaged coral reefs can be restored

【答案】

【1】D

【2】A

【3】A

【4】B

【解析】本文主要介紹了珊瑚礁所面臨的問(wèn)題以及應(yīng)對(duì)的方法。珊瑚礁由于全球變暖以及人類(lèi)的一些海底作業(yè)而瀕臨滅絕。對(duì)此，Coral bots卻是一個(gè)挽救珊瑚礁的好幫手，它可以長(zhǎng)時(shí)間呆在水下以幫助受損的珊瑚礁重新生長(zhǎng)。

試題分析:

【1】D 細(xì)節(jié)理解題。根據(jù)第二段的There are two main reasons for the destruction—the rising carbon dioxide levels caused by global warming as well as human influences like bottom operation．可知有兩個(gè)原因?qū)е律汉鹘该媾R滅絕。故選擇D，指人類(lèi)海底作業(yè)導(dǎo)致珊瑚礁面臨滅絕。

【2】A 細(xì)節(jié)理解題。根據(jù)第三段最后的But the method has only limited success because they cannot stay long underwater, nor reach depths of over 200 meters where some of the deep-sea coral grows．以及第四段的However，this is not the case for Coral bots可知，志愿者不能長(zhǎng)時(shí)間呆在水下，但是Coral bots可以，故選擇A，指它可以長(zhǎng)時(shí)間呆在水下。

【3】A 詞語(yǔ)辨析題。本題考查代詞的指代意義。根據(jù)下文的use them effectively in the waters off Scotland and then hopefully in the oceans across the world．可知這里的them指代的是上文提到的Coral bots，因?yàn)橐眠@樣?xùn)|西來(lái)修復(fù)珊瑚礁。故選擇A。

【4】B 推理判斷題。根據(jù)文章第三段的the good news is that if these branches are found quickly，they can be saved可知，珊瑚礁如果被損后再短時(shí)間內(nèi)修復(fù)還是可以的。故選擇B。選項(xiàng)A未涉及；根據(jù)最后一段的It is in the final stage of testing可知選項(xiàng)C錯(cuò)誤；而根據(jù)then hopefully in the oceans across the world可知修復(fù)所以珊瑚礁只是有希望，而不是絕對(duì)會(huì)被修復(fù)，故選項(xiàng)D錯(cuò)誤。

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