科目名称：理工英语1
试卷号：23894
题型：单选题
题目：Why is it called head-down syndrome when we are addicting to the smartphone?
选项：A. Because we are looking down when we read. B. Because we are looking up when we read. C. Because we are heading down when we read.
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答案：C. Because we are heading down when we read.
