1. The difference between their typing rates is 10 words per minute.
2. Bob types at a constant rate of 80 words per minute.
答案选E,我选的B. 像2这种说法,可以判断出两人速度一样的不行么?
要有确定且唯一的答案才可以
选B 还是不知道Bob or John 谁快
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