單項(xiàng)選擇題

Tripping defects in anchors frequently occur in（）.

A.deep water
B.shallow water
C.stiff soils
D.soft soils

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單項(xiàng)選擇題

To reduce mild fever the MOST useful drug is（）.

A.bicarbonate of soda
B.paregoric
C.aspirin
D.aromatic spirits of ammonia

單項(xiàng)選擇題

To prevent a wooden hull from leaking you caulk it（）.

A.after drydocking，while the hull is moist
B.after drydocking，and the hull has dried
C.afloat，where it is leaking
D.afloat，in all accessible areas