第16题:[单选题] The purpose of air tanks in a lifeboat is to ______. A.Make the boat float higher B.Provide a stowage place for provisions C.Add strength to the boat D.Keep the boat afloat if flooded 参考答案:D 【参考译文】救生艇内空气箱的作用是如果艇进水能保持漂浮。 【解 析】air tank空气箱 afloat浮在水面的 flood进水