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题目内容
（华北水利水电大学混凝土结构设计原理）
It is reported that obesity among American adults has ______ more than 70 percent in the past 25 years. ( )(本题2.0分)
A、 been increased
B、 increased for
C、 been increased
D、 increased by
A、 been increased
B、 increased for
C、 been increased
D、 increased by
参考答案
