【单选题】
Toads are Arthritis and in Pain
Arthritis(关节炎) is an illness that can cause pain and swelling in your bones. Toads (蟾蜍), a big problem in the north of Australia, are suffering from painful arthritis in their legs and backbone, a new study has shown. The toads that jump the fastest are more likely to be larger and to have longer legs._______(46)
The large yellow toads, native to South and Central America, were introduced into the north-eastern Australian state of Queensland in 1935 in an attempt to stop beetles and other insects from destroying sugarcane crops. Now up to 200 million of the poisonous toads exist in the country, and they are rapidly spreading through the state of Northern Territory at a rate of up to 60 km a year. The toads can now be found across more than one million square kilometres._______(47) A Venezuelan poison virus was tried in the 1990s but had to be abandoned after it was found to also kill native frog species.
The toads have severely affected ecosystems in Australia. Animals, and sometimes pets, that eat the toads die immediately from their poison, and the toads themselves eat anything they can fit inside their mouth._______(48)
A co-author of the new study, Rick Shine, a professor at the University of Sydney, says that little attention has been given to the problems that toads face. Rick and his colleagues studied nearly 500 toads from Queensland and the Northern Territory and found that those in the latter state were very different. They were active, sprinting down roads and breeding quickly.
According to the results of the study, the fastest toads travel nearly one kilometre a night._______(49) But speed and strength come at a price — arthritis of the legs and backbone due to constant pressure placed on them.
In laboratory tests, the researchers found that after about 15 minutes of hopping, arthritic toads would travel less distance with each hop (跳跃)._______(50) These toads are so programmed to move, apparently, that even when in pain the toads travelled as fast and as far as the healthy ones, continuing their constant march across the landscape.
A. Toads are not built to be road runners they are built to sit around ponds and wet areas.
B. The task now facing the country is how to remove the toads.
C. Furthermore, they soon take over the natural habitats of Australia’s native species.
D. Toads with longer legs move faster and travel longer distances while the others are being left behind.
E. But this advantage also has a big drawback — up to 10% of the biggest toads suffer from arthritis.
F. But arthritis didn’t slow down toads outside the laboratory the research found.
网考网参考答案：E、B 、C 、A、F
网考网解析：
蟾蜍是关节炎和疼痛中 关节炎（关节炎）是一种疾病，可引起疼痛和骨骼肿胀。蟾蜍（蟾蜍），在澳大利亚北部的一个大问题，是从痛苦关节炎在他们的腿和骨干痛苦，一项新的研究显示。该跳最快蟾蜍更可能是更大的，并具有更长的腿._______（46） 大黄色蟾蜍，原产于南美洲和中美洲，引入昆士兰东北澳大利亚州于1935年，企图阻止甲虫等昆虫破坏甘蔗作物。现在，高达200亿美元的有毒蟾蜍存在于该国，他们迅速通过北领地的国家以每年高达60公里的速度蔓延。蟾蜍现在可以跨越多百万平方公里._______（47）委内瑞拉毒病毒试图在20世纪90年代，但有后发现也杀了本地青蛙物种被抛弃发现。 蟾蜍已经严重影响了澳大利亚的生态系统。动物，有时宠物，那吃蟾蜍从他们的毒药立即死亡，而蟾蜍自己吃什么就可以装进自己的嘴巴._______（48） 合着者的新研究中，里克服务，在悉尼大学的教授说，很少有人注意给予了蟾蜍所面临的问题。里克和他的同事从昆士兰州和北领地研究了近500蟾蜍发现，那些在后者的状态有很大不同。他们是活跃的，冲刺下来的道路和繁殖迅速。 根据研究结果，最快的蟾蜍旅游近一公里一个晚上._______（49），但速度和力量是有代价的 - 腿和骨干因恒压放在他们的关节炎。 在实验室测试中，研究人员发现，大约15分钟的跳跃后，关节炎蟾蜍会减少出行距离，每一跳（跳跃）._______（50）这些蟾蜍是如此编程移动，显然，即使当在痛苦中走过蟾蜍快和尽可能健康的人，继续他们的整个景观不断进军。 A.蟾蜍不建为公路赛跑，他们在建造时，坐在周围的池塘和湿地区。 B.现在国家面临的任务是如何去掉蟾蜍。 C.此外，他们很快接管澳大利亚的本土物种的自然栖息地。 D.与蟾蜍更长的腿移动速度更快，行驶更长的距离，而其他人都被抛在后面。 E.但这种优势也有一个很大的缺点 - 达最大的蟾蜍10％患有关节炎。 F.但是关节炎没有实验室研究发现外减慢蟾蜍。 查看试题解析出处>>
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