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不定项选择

‎经 过 动 平 衡 校 正 的 刚 性 转 子 ， 任 一 回 转 面 内 仍 可 能 存 在 偏 心 质 量 。‏

A．正确
B．错误

判断题

/t/ is a voiceless and aspirated sound with vibration of vocal cords.
正确
错误