问题
单项选择题
A wildlife preserve is being planned for 3,000 rhinoceroses. The preserve is to contain a total of 10,000 acres of watering area, plus 100 acres of grazing area for each rhinoceros. If the number of rhinoceroses is expected to increase by 10 percent, how many thousand acres should the preserve have in order to provide for the increased population ？（）
A．340
B．330
C．320
D．310
E．300
答案
参考答案：A
解析：
正确解答该题的关键是对题意的确切理解。题目中的“a total of”指水域面积是不变的，不会随犀牛数量的增加而增加，each指每增加一头犀牛所需的草地，the increased population指增加后的犀牛数目，由以上分析可得：
10000+100×3000(1+10%)
=340000
=340 thousand
