According to the passage, when would most weight be imposed on hip-joints? Engineers regard the replacement of hip-joints as a(

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问题 According to the passage, when would most weight be imposed on hip-joints?
Engineers regard the replacement of hip-joints as a(n) ______problem.

选项 A、mechanical
B、medical
C、health
D、agricultural

答案A

解析 细节题。依据第一段最后一句。工程师认为是工程问题,即机械工程问题。
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