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  3. Choose THREE letters, A-EThe invention of different gears on a bicycle affected

Choose THREE letters, A-EThe invention of different gears on a bicycle affected

游客2024-01-06  65
问题 Choose THREE letters, A-E
The invention of different gears on a bicycle affected which THREE of the following?
A Wheel size
B Balance
C Rate of speed
D The back wheel
E Safety
F Downhill travel [br]
选项
答案 D
解析
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