第3题:[单选题] Buoys which mark isolated dangers are painted with alternating ______. A. Red and black bands B. Green and black bands C. Red and white stripes D. Green and white bands 参考答案:A 【参考译文】标志孤立危险物的浮标应漆成红黑交替横纹。 【解 析】isolated danger孤立危险物alternating交替的band横纹