第32题: [单项选择]Students and teachers can participate in the excursions to lovely beaches around the island at regular ______. A. gaps B. rate C. length D. intervals 参考答案:D 答案解析:[分析] 本题考核易混名词辨析。选项中gap意为“裂缝,缺口,差距,差异”,如:Gaps often exist between generations,for the older and the y