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

游客2025-02-12 7

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 C

解析 C D F对于多选题，要注意辨别选项是否有干扰。本题干扰信息不多，可以通过录音直观选出答案CDF。

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