问题
单项选择题
从世界上第一台水压机问世算起，液压传动至今已有（）余年的历史。
A.50
B.100
C.150
D.200
答案
参考答案：D
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从世界上第一台水压机问世算起，液压传动至今已有（）余年的历史。
A.50
B.100
C.150
D.200
参考答案：D
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