“He doesn’t actually want the waste,” says Aimee Hurt, a founding member of the U．S．-based group Working Dogs for Conservation．Hurt is in Kenya to train both Oakley and his handler．“He finds it so he can play with his ball．We’re the ones who want the waste．”

　　Detection dogs are sometimes taught to locate actual animals．Black-footed ferrets （雪貂） have been studied with their help．But more often the dogs learn to locate the waste of creatures such as bears, wolves and mountain lions．

　　What the dogs find provides scientists with data about a species．Scientists can use the DNA collected from animal waste to identify individuals, sex, and population sizes — all without ever seeing the animal itself．“It can take years to gather this kind of information if you have to trap animals,” Hurt explains．

　　Waste analysis might make a huge difference when wild species are accused of attacking domestic livestock （家畜）．Hurt says, “A good detection dog will find the waste so we can see what the animal is actually eating．” This may help reduce problems between people and wildlife．

　　56．The underlined word “She” in Paragraph 2 refers to

　　“_____”．

　　A．the German shepherd

　　B．an African wild dog

　　C．Aimee Hurt

　　D．the handler

　　57．Oakley is interested in finding the waste because _____．

【2017届高三一轮英语 单元验收试题4 新人教版】相关文章：

★ 湖南省岳阳市2014高考英语一轮单项选择训练题（9）及答案

★ 重庆市铜梁中学2013届高三下学期二轮复习定时练习（一）英语试题

★ 2017届高考英语二轮复习课时训练：3（含解析）

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (24)

★ 2017届高考英语二轮复习课时训练：6（含解析）

★ 2014高考英语（新人教版）一轮基础训练（2）A、B卷（附答案或解析）

★ 2017届高考英语二轮复习课时训练：2（含解析）

★ 2017届高考英语二轮复习课时训练：20（含解析）

★ 2017届高考英语二轮复习课时训练：14（含解析）

★ 2017届高考英语二轮复习大题冲关秘籍阅读理解七选五：考纲解读（含解析）