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【单选题】

______ is medical technology that allows the prolongation of life artificially while the world is already over-populated
A．Of what use

B．What use
C．Of which use
D．Which use
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根据网考网移动考试中心的统计，该试题：

4%的考友选择了A选项

86%的考友选择了B选项

8%的考友选择了C选项

2%的考友选择了D选项

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