B[2015.山东威海一中高三模拟]Coralreefs(珊潮ft)arenotjustbeautifultolookatbutalsoveryuseful.Theyshelternearly25%ofoceanlifeandprovidefoodforbillionsofpeople.Howeverlikemanyotherspeciesthisamazi

Question

B [2015 .山东威海一中高三模拟] Coral reefs(珊潮ft) 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(生态系统)is in danger of dy?ing out ！

There are two main reasons for the destruction—the ris?ing 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 damages the ocean floor causing the coral branches to sepa?rate 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 metres where some of the deep-sea coral grows.

However this is not the case for coralbots―the robots that can constantly seek out broken branches. A team of 'cor-albots' 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 sim?ilar 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 coralbots offers us the possibility to restore (修复)the function of reefs. It is in the final stage of testing. Once ready? the re?searchers hope to build hundreds of them and use them effec?tively in the waters off Scotland and then hopefully in the o-ceans across the world."

5.     Which of the following is a cause of the clanger that coral reefs are facing?

 

A.     The appearance of new creatures.

B.     The seriously polluted sea water.

C.     The activities of volunteer clivers.

D.     Human activities like bottom operation.

6.     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

7.     What does the underlined word "them" in the last para?graph refer to?

A. Coralbots.                            B.  Broken branches.

C. Working bees.                      D.  Bits of coral.

8.     We can infer from the passage that ____________ ，

 

A.     bottom operation has affected most underwater crea?tures

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 re?stored

Answer 1

B [文章大意]本文主要介绍了珊瑚礁所面临的问题以及应对的方法。珊瑚礁由于全球变暖以及人类的一些海底作业而濒临灭绝。对此，Coralbots却是挽救珊瑚礁的好帮手，它们可以长时间待在水下以帮助受损的珊瑚礁重...