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单选题
For integer values of the age from 10 months to 14 months, the average (arithmetic mean) weight falls approximately between ______ pounds.
A
750 and 850
B
850 and 950
C
950 and 1050
参考答案
参考解析
解析：
在10个月时，大象的体重大约为800磅，到了14个月大象的体重大约为1000磅，在这期间大象的体重变化比较平稳，因此体重平均数大约为900磅，故答案选B。
在10个月时，大象的体重大约为800磅，到了14个月大象的体重大约为1000磅，在这期间大象的体重变化比较平稳，因此体重平均数大约为900磅，故答案选B。
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