在我国、下列哪种动物正处在灭绝的边缘（ ）
A．伊犁马
B．黄羊
C．白鳍豚
D．蝎
答案：C
此题考查的知识点是珍稀动物．解答时可以从白鳍豚的特点数量和家兔、黄羊、蝎的分布方面来切入
解：白鳍豚为国家一级保护动物，白暨豚、白旗．白暨豚是鲸类家族中小个体成员，中文名白鳍豚，属于喙豚科，身体呈纺锤形，全身皮肤裸露无毛，具长吻，白鳍豚已存在有2500万年，喜欢群居，视听器官严退化，声纳系统特别灵敏，能在水中探测和识别物体．白鳍豚是恒温哺乳动物，用肺呼吸，被誉为“水中的大熊猫”．主要生活在长江中下游，目前数量极少，可能濒临灭绝．
黄羊主要分布于蒙古国、中国和俄罗斯的西伯利亚地区，在中国分布于吉林、内蒙古、河北、山西、陕西、宁夏、甘肃和新疆等省区．伊犁马是新疆牧区的优良畜种；蝎是我国分布较广，又被广泛养殖的中药材．伊犁马、黄羊、蝎都不是珍稀动物．
故选C．
解答此类题目的关键是熟知白鳍豚的现状．
George and Betty didn’t have much money, but they wanted to buy a car. Betty didn’t have a , so she was always finding ways to save money. She grew vegetables in her garden so that she wouldn’t have to buy any. She made sandwiches for George to to work so that he wouldn’t have to buy his lunch. Every day, George took the bus to go to work and go home. It was not a long trip the bus was slow because of traffic. One day, the traffic was even than usual. “I could run faster than this bus!” thought George. The next day work he decided to have a try. He went to the bus stop, but didn’t the bus. He ran along beside it in the sidewalk. He had to run fast to catch up with the bus. He arrived home. Betty was to see him painting (气喘). She was worried. “What’s the matter?” “I ran along beside the bus,” said George. “I saved two dollars and fifty cents paying the fare.” He thought it would make Betty happy, but it didn’t. “ didn’t you run beside a taxi?” she said, “You would have saved six dollars!”
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