46. What is the passage mainly about?
(A) Useful cellphone applications.
(B) Injuries caused by cellphone use.
(C) Dangers of texting while walking.
(D) Reasons for emergency room visits.
詳解 (共 2 筆)
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這段文章主要是什麼？ （A）有用的手機...
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Believe it or not, t...
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