2. 外语
  3. A、The number of protected sites would increase to 54. B、The protected vegetation types would increase to 54. C、The land area cov

A、The number of protected sites would increase to 54. B、The protected vegetation types would increase to 54. C、The land area cov

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问题
选项 A、The number of protected sites would increase to 54.
B、The protected vegetation types would increase to 54.
C、The land area covered by protected sites would increase by 5496.
D、The cost-effectiveness of protected areas would increase by 54%.
答案B
解析 根据题干中的replacing just 1 per cent of the least cost-effective areas可以快速定位到第5段第3句。解题关键在于弄清the number指的是什么的数量。答案在上一句找。该段第2句说到，澳大利亚60种植被中只有18种得到了保护，因此可以判断这里的the number指的是受保护植物的数目。因此排除A，选B。
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