纵向砂丘(longitudinal dune)
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海岸沙丘(coastal dune)
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2、Longitudinal and transverse separtions
Longitudinal and transverse separtions between the tanks,which are used to prevent liquids from leaking from one double bottom tank into the other ,are called().Adouble bottomsBcofferdamCnavigating bridgeDsuperstructure
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星状砂丘(star dune)
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一般新月形砂丘的()方向表征当地的主风向。()A由凸出一侧指向凹形一侧的B由凹形一侧指向凸出一侧的C平行于弦的D不一定
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新月型砂丘(barchan dune)
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6、Lighter longitudinal stiffening frames
Lighter longitudinal stiffening frames on the vessel side plating are called().AstringersBside framesCside stiffenersDintercostal