第27题:[单选题] Large scale charts are also called _____________ and are used when approaching the harbours and jetties. A. natural scale charts B. reference charts C. coastal charts D. harbour charts 参考答案:D 【参考译文】大比例尺海图又称为港湾图,在(船舶)靠近港口和码头时使用。 【解 析】harbour港口jetty码头