I'd like to buy a _ bicycle.A ten-speed racing B ten-speeds racing C ten of speed race D ten-speed

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I'd like to buy a _ bicycle.A ten-speed racing B ten-speeds racing C ten of speed race D ten-speed

A
ten-speed 十速的(构成数词+名词这种类型复合词时,当中加-,不管数词是否大于1,后面名词用单数),所以B/C是错的
racing bicycle 赛车、竞赛用自行车
D错在十速自行车,用这么多档速的自行车是racing bicycle不是一般的bicycle

A 作定语 连词符后应加名词单数
望采纳