六级听力

    听力部分一直以来都是同学们考试时的难点，也是吐槽最多的部分。想要早点为下半年的四六级考试做准备就来四六级考试网练习一下英语 六级听力题吧，考虑六级听力的特点，我们特别准备了VOA的常速听力材料哦。

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听力材料：　　

　　The biggest threat to rhinos are poachers who killthem for their horns.

　　In spite of a lack of scientific proof, many in Vietnamand China believe that pills made of ground rhinohorns can cure various diseases and disorders.

　　Since 2008, poachers in South Africa have killedalmost 3,000 rhinos.

　　The International Union for Conservation of Nature warns that they may become extinct before2026.

　　The northern white rhinoceros, which actually is grey, is extinct in the wild.

　　There are only four animals of this subspecies remain and all of them are held in captivity-threefemales and the only male,called Sudan.

　　“If we lose him it will be a very big loss for the endangered species.”

　　Natural pregnancy and birth among the four are unlikely, so at Kenya's Ol PajetaConservancy, scientists are trying to inseminate northern white rhino eggs in the lab andimplant them in southern white rhino females.

　　“The initial approach will be to look at in-vitro fertilization.

　　Removal of eggs from three remaining females and mixing those eggs with sperm stored fromnorthern white rhinos across the world,

　　to create an embryo which will then be implanted into a surrogate white rhino female to createa northern white rhino calf.”

　　Meanwhile, two U.S.-based scientists say they are using the latest biotechnology techniques tocreate artificial rhino horn-something that not only looks and feels like the real thing, butcontains the same proteins.

　　“We are not bio-identical yet though that is the goal.”

　　They hope that poachers will find it cheaper and safer to resell the lab-grown horns to theirAsian customers as authentic, rather than to risk their lives or long prison sentences huntingfor real rhinos.

　　No matter how they test the substance, customers will not be able to tell the difference.

　　Researchers say flooding the market with artificial horns may keep the animals with the realhorns safe from poachers.

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