首页 - 网校 - 万必威注册 - 美好明天 - 直播 - 团购 - 书城 - 学习通 - 导航 -
必威体育betwayAPP下载吧提供“职称英语《卫生C》补全短文历年真题精选”,希望能给考生的备考带来帮助,更多内容请关注“必威体育betwayAPP下载吧职称英语”微信,或必威体育betwayAPP下载吧职称英语必威体育betwayAPP下载网。

  >>>职称英语《卫生C》补全短文历年真题精选汇总

  >>>关注“必威体育betwayAPP下载吧职称英语”微信,获取精华复习资料

  Toads are Arthritis and in Pain

  Arthritis is an illness that can cause pain and swelling in your bones. Toads, 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 kilometers.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 kilometer 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 relentless march across the landscape.

  A. But this advantage also has a big drawback--up to 10% of the biggest toads suffer from arthritis.

  B. The task now facing the country is how to remove the toads.

  C. But arthritis didn't slow down toads outside the laboratory.

  D. Toads with longer legs move faster and travel longer distances while the others are being left behind.

  E. Toads are not built to be road runners-- they are built to sit around ponds and wet areas.

  F. Furthermore, they soon take over the natural habitats of Australia's native species.

长按二维码关注即可获得职称英语证书
获取2017职称英语必威体育官方下载时间
获取2017职称英语必威体育官方下载条件
获取历年职称英语真题试卷
获取10页精华点题讲义

职称英语必威注册手机必威注册下载】丨微信搜索"必威体育betwayAPP下载吧职称英语"

职称英语QQ群

  相关推荐:

  职称英语《卫生C》必威体育betwayAPP下载历年真题精选汇总

  职称英语《卫生C》词汇选项历年真题精选汇总

  2009-2016职称英语必威体育betwayAPP下载真题及答案|解析|估分|下载

0
收藏该文章
0
收藏该文章
文章搜索
·精选试题 ·智能练习
·智能评估 ·视频解析
扫描二维码下载
版权声明:如果职称英语必威体育betwayAPP下载网所转载内容不慎侵犯了您的权益,请与我们联系800@exam8.com,我们将会及时处理。如转载本职称英语必威体育betwayAPP下载网内容,请注明出处。
Copyright © 2004- 必威体育betwayAPP下载吧职称英语必威体育betwayAPP下载网 出版物经营许可证新出发京批字第直170033号 
中国科学院研究生院权威支持(北京)
在线
咨询
官方
微信
关注职称英语微信
领《大数据宝典》
下载
APP
下载职称英语万必威注册
领精选6套卷