【名词&注释】
救生艇(boat)、救生筏(life raft)
[单选题]救生艇通道的要求包括( )。
A. 进入救生艇的通道两边应该设有护栏
B. 应该能够将躺在担架的病员抬进、抬出艇内外
C. 应该设有自动升降平台
查看答案&解析
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举一反三：
[单选题]Which statement is NOT true?
A. In a simple vane pump, the rotor and cam ring are exactly concentric
B. Balanced vane pump has an elliptical cam ring
C. Liquid in both gear pump and vane pump are forced out to the outlet.
D. Balanced vane pumps can work at a higher pressure than the simple vane pump
[单选题]救生筏的构造应为从______mm高处投落下水后，救生筏及其属具能符合使用要求。
A. 15
B. 18
C. 25
D. 30
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