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【单选题】
若在页面中要实现背景音乐播放的倒计时,如:“02:15"字样,那么要使用BackgroundAudioManager(背景音频管理器)对象的哪个属性获取当前音乐的总时长。
A.
BackgroundAudioManager.duration
B.
BackgroundAudioManager.duration()
C.
BackgroundAudioManager.currentTime
D.
BackgroundAudioManager.currentTime()
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