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单选题
The elapsed time resets to 0 when the button is held down for two seconds.
A
A.The counted time resets to 0 when the button is kept down for two seconds.
B
B.The total time resets to 0 when the button is held on for two seconds.
C
C.The remained time resets to 0 when the button is seen down for two seconds.
答案解析
正确答案：A
相关知识点：
按住按钮两秒计时归零
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