According to the passage cell phones were launched______.A.in the late 1970sB.between 195

学历类 专四 已帮助 人

According to the passage, cell phones were launched______.

A.in the late 1970s

B.between 1955 and 1960

C.in the late 1955s

D.in the early 1990s

请帮忙给出正确答案和分析,谢谢!

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