They all have one thing () common: they have the functions of a phone and a computer in a single pocket-sized unit.

科目名称：理工英语1

试卷号：23894

题型：词汇与结构(单选题)

题目：They all have one thing () common: they have the functions of a phone and a computer in a single pocket-sized unit.

选项：A. on B. with C. in

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答案：C. in