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【单选题】
舱壁上动力滑动门的操纵方式有____。①驾驶室遥控关门；②在舱壁甲板上可到达之处的手动操纵处用摇柄转动关门；③现场门的里外用独立的手动机械装置开关门
A.
①②
B.
②③
C.
①③
D.
①②③
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