雅思机经听力试题--保护红树林及答案解析.doc

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1、雅思机经听力试题-保护红树林及答案解析(总分：21.00，做题时间：120 分钟)一、红树林的作用(总题数：1，分数：5.00)Listen to the statement and complete the blanks below. Use up to three words. Mangroves can not only protect the seashore and riverbank, but also lowers the power of 1 1Mangroves roots can help conserve 2 2Previously mangroves were used

2、 to protect the quay and supply food for the fish. Besides the functions mentioned above, the mangrove can also be used as the storage of 3 3Any ruin of mangrove forests will not only destroy their function of protecting the land, but also the function of 4 4.And the corrosion of the shoreline could

3、 eventually influence the stability of 5 5.（分数：5.00）填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_二、红树林的破坏(总题数：1，分数：4.00)Listen to the statement and complete the following sentences with NO MORE THAN THREE WORDS.（分数：4.00）(1).In some Asian countries like India and Vietnam, almost 1of the mangroves have disappea

4、red.（分数：1.00）填空项 1:_(2).The harvesting of the mangroves for 1，wood chip and pulp production is now overloaded.（分数：1.00）填空项 1:_(3).The mangroves forest would be poisoned by 1，which will further kill lives in the forest.（分数：1.00）填空项 1:_(4).Dumped 1on mangroves forest are another reason responsible for

5、 the destruction.（分数：1.00）填空项 1:_三、保护红树林的措施(总题数：1，分数：5.00)Listen to the conversation and identify the following statements, TRUE (T)，FALSE (F)，or NOT GIVEN (N).（分数：5.00）(1).The couple lives in someplace surrounded by mangroves._（分数：1.00）A.TRUEB.FALSEC.NOT GIVEN(2).Sand was once expected to act as th

6、e barrier to protect the mangroves and it was a success._（分数：1.00）A.TRUEB.FALSEC.NOT GIVEN(3).None of mangroves can be cut for any purpose._（分数：1.00）A.TRUEB.FALSEC.NOT GIVEN(4).The couple will never cut any mangroves as firewood._（分数：1.00）A.TRUEB.FALSEC.NOT GIVEN(5).The man thinks they should join i

7、n the activity to clean up trashes in the mangroves._（分数：1.00）A.TRUEB.FALSEC.NOT GIVEN四、红树林种子的特点(总题数：1，分数：3.00)Listen to the statement and answer the questions with NO MORE THAN TWO WORDS.（分数：3.00）(1).What kind of environment must the mangrove trees tolerate? 1（分数：1.00）填空项 1:_(2).What is the color o

8、f the mangrove seeds? 1（分数：1.00）填空项 1:_(3).When the seedling forms a propagule, what can be achieved through photosynthesis? 1（分数：1.00）填空项 1:_五、培育红树林幼苗(总题数：1，分数：2.00)Listen to the statement and circle the appropriate letter.（分数：2.00）(1).According to the statement, the seedlings can be watered by_.（分

9、数：1.00）A.only freshwaterB.only sea waterC.both the freshwater and rain water(2).You will see aerial roots if_.（分数：1.00）A.the plant pot is placed in a seed raising mix for 6 monthB.the plant pot is placed in a bucket of salt water for 6 monthsC.the plant pot is placed in a bucket of semi-salt water f

10、or 6 months六、保护红树林的幼苗(总题数：1，分数：2.00)Listen to the conversation and circle the appropriate letter.（分数：2.00）(1).How did the man know mangroves?（分数：1.00）A.The woman told him.B.He came here to see it beforeC.He once read an article about it in National geographic.(2).Which one is not mentioned as a thre

11、at to the mangroves seedlings?（分数：1.00）A.floodB.stormC.large population of rabbits雅思机经听力试题-保护红树林答案解析(总分：21.00，做题时间：120 分钟)一、红树林的作用(总题数：1，分数：5.00)Listen to the statement and complete the blanks below. Use up to three words. Mangroves can not only protect the seashore and riverbank, but also lowers th

12、e power of 1 1Mangroves roots can help conserve 2 2Previously mangroves were used to protect the quay and supply food for the fish. Besides the functions mentioned above, the mangrove can also be used as the storage of 3 3Any ruin of mangrove forests will not only destroy their function of protectin

13、g the land, but also the function of 4 4.And the corrosion of the shoreline could eventually influence the stability of 5 5.（分数：5.00）填空项 1:_ （正确答案：winds and waves）填空项 1:_ （正确答案：water and soil）填空项 1:_ （正确答案：nutrient substances）填空项 1:_ （正确答案：water purification）填空项 1:_ （正确答案：the ecosystem）解析：二、红树林的破坏(总

14、题数：1，分数：4.00)Listen to the statement and complete the following sentences with NO MORE THAN THREE WORDS.（分数：4.00）(1).In some Asian countries like India and Vietnam, almost 1of the mangroves have disappeared.（分数：1.00）填空项 1:_ （正确答案：50%）解析：More than 35%of the worlds mangroves are already gone. The figu

15、re is as high as 50% in countries such as India, the Philippines, and Vietnam, while in the America they are being cleared at a rate faster than tropical rainforests. The first factor that contributes to this situation lies in the overharvest. Mangrove trees are used for firewood, wood chip and pulp

16、 production. While harvesting has taken place for centuries, in some parts of the world it is no longer sustainable, threatening the future of the forests. The second factor is fertilizers, pesticides, and other toxic man-made chemicals carried by river streams from sources upstream, which can kilt

17、animals living in mangrove forests, while oil pollution can smother mangrove roots and suffocate the trees. Whats more, trashes dumped by the farmers on the mangroves forest are systematically destroying the forest as well.(2).The harvesting of the mangroves for 1，wood chip and pulp production is no

18、w overloaded.（分数：1.00）填空项 1:_ （正确答案：firewood）解析：(3).The mangroves forest would be poisoned by 1，which will further kill lives in the forest.（分数：1.00）填空项 1:_ （正确答案：oxic man-made chemicals）解析：(4).Dumped 1on mangroves forest are another reason responsible for the destruction.（分数：1.00）填空项 1:_ （正确答案：tras

19、hes）解析：三、保护红树林的措施(总题数：1，分数：5.00)Listen to the conversation and identify the following statements, TRUE (T)，FALSE (F)，or NOT GIVEN (N).（分数：5.00）(1).The couple lives in someplace surrounded by mangroves._（分数：1.00）A.TRUE B.FALSEC.NOT GIVEN解析：woman： Look at this article, honey! man： What is it mainly ab

20、out? woman： It says that the mangrove forests have diminished significantly. Even in some places they cannot protect the seashores. Maybe we should move away from this beach. man： Oh, honey, dont be silly. It will not be that serious. Are you sure you have read all the contents? woman： Well, right.

21、The solutions are also given.What a relief! man： So, what are the measures that have been taken? woman： Let me see.it says that once the sand was used as a barrier to protect the mangrove forests, but it didnt work much in the end. And after this failure some other measures have been taken by the go

22、vernment, which have made a significant difference! Thank God! man： So. Dont worry. Then what has the government done? woman： It suggests that we should impose restrictions on the cutting of mangroves for personal or commercial use. And whats more, there are thousands of volunteers who participate i

23、n mangrove cleanups all over the island each year to create a healthier environment for the mangroves. man： Oh, in that case, we should also take part in the activity.(2).Sand was once expected to act as the barrier to protect the mangroves and it was a success._（分数：1.00）A.TRUEB.FALSE C.NOT GIVEN解析：

24、(3).None of mangroves can be cut for any purpose._（分数：1.00）A.TRUEB.FALSE C.NOT GIVEN解析：(4).The couple will never cut any mangroves as firewood._（分数：1.00）A.TRUEB.FALSEC.NOT GIVEN 解析：(5).The man thinks they should join in the activity to clean up trashes in the mangroves._（分数：1.00）A.TRUE B.FALSEC.NOT

25、GIVEN解析：四、红树林种子的特点(总题数：1，分数：3.00)Listen to the statement and answer the questions with NO MORE THAN TWO WORDS.（分数：3.00）(1).What kind of environment must the mangrove trees tolerate? 1（分数：1.00）填空项 1:_ （正确答案：saline environment）解析：Mangrove trees or shrubs live in saline costal habitat, therefore these

26、plants must adapt to such extremely saline environment to overcome the problems of anoxia, high salinity and frequent tidal inundation. The seeds of mangrove trees are usually grey, which are viviparous whose seeds germinate while still attached to the parent tree. Once germinated, the seedling grow

27、s either within the fruit or out through the fruit to form a propagule which can produce its own food via photosynthesis.(2).What is the color of the mangrove seeds? 1（分数：1.00）填空项 1:_ （正确答案：grey）解析：(3).When the seedling forms a propagule, what can be achieved through photosynthesis? 1（分数：1.00）填空项 1:

28、_ （正确答案：food）解析：五、培育红树林幼苗(总题数：1，分数：2.00)Listen to the statement and circle the appropriate letter.（分数：2.00）(1).According to the statement, the seedlings can be watered by_.（分数：1.00）A.only freshwaterB.only sea waterC.both the freshwater and rain water 解析：Seedlings can be dug up and replanted into a p

29、lant pot in fine, silty mud. Or, seeds of grey and other mangroves can be placed in a seed raising mix. The seedlings can be watered with freshwater or left in the rain water. If you place the plant pot in a bucket of semi-salt water, the mangrove seedling is more likely to develop aerial roots afte

30、r at least six months. The plants can be examined for salt crystals coming through the salt glands on the surface of leaves. Then the seedling can eventually be replanted in a mangrove forest.(2).You will see aerial roots if_.（分数：1.00）A.the plant pot is placed in a seed raising mix for 6 monthB.the

31、plant pot is placed in a bucket of salt water for 6 monthsC.the plant pot is placed in a bucket of semi-salt water for 6 months 解析：六、保护红树林的幼苗(总题数：1，分数：2.00)Listen to the conversation and circle the appropriate letter.（分数：2.00）(1).How did the man know mangroves?（分数：1.00）A.The woman told him.B.He came

32、 here to see it beforeC.He once read an article about it in National geographic. 解析：woman： Do you know the name of the trees besides the sea over there? man： Yeah, it is mangrove, right? woman： Exactly. I have thought that you would have no idea of what it is since you come from an inland city. man：

33、 Well, I didnt know it until one day when I read an article about it with its picture in National Geographic. The mangrove forests act as “coast guard” to protect the seashore from flood. And I have also done some study on the risks that their seedlings face. woman： Seedlings? Well, what risks? man：

34、 According to some statistics, every year, lots of the mangrove seedlings are destroyed by storms. woman： It isnt surprising. You know storms can destroy everything. man： Yeah. And in some small islands, there is an increasingly number of rabbits day by day, which also makes it very necessary to tak

35、e some measures to slow down the reproduction rate because the rabbits always eat the seedlings. woman： Wow. Little things can make a big difference. man： Yeah, so every small aspect should be taken into consideration to make sure that the mangrove seedlings can grow up smoothly.(2).Which one is not mentioned as a threat to the mangroves seedlings?（分数：1.00）A.flood B.stormC.large population of rabbits解析：