Leg penetration to depths which require pullout forces greater than that which can be supplied by the buoyancy of the hull may exist in（）.<br>A:soft mud<br>B:sand<br>C:silt<br>D:soft to firm clays

Leg penetration to depths which require pullout forces greater than that which can be supplied by the buoyancy of the hull may exist in（）.
A:soft mud
B:sand
C:silt
D:soft to firm clays

出自：海船船员证

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