题目

Mary and Peter’s plan for next weekMaryPeter Sunday8:00 supper with Betty and Annbasketball team party 9:00 pm Monday7:30 go to the cinemaStudy group meeting 3:00pm Tuesday11:00 doctorBasketball match 4:30 pm Wednesday9:00 table tennis game Evening-study for examgo to see some friends 2:00pm Thursday8:30 concertNoon，lunchwith Larry FridayAfternoon-help UncleSam in his restaurant2:00-4:00 pm Volunteer(志愿者) work at student centre Saturday9:00—10:30 art class 2:00 visit grandmotherShopping 10:00 am 1．On Sunday morning Mary will __________．   A．be free          B读下图回答下列有关问题。（14分）(1)判断河流AB段与AC段流速的差异，并运用数据说明判断理由。（6分） (2)该区域设计并修建了两条游览步道，欲从A点到达D点，请从甲、乙两条线路中任选其中一条，说明其主要利弊。（4分） (3)有关部门计划建设一条从丙地沿直线到达D处的登山索道，并在丙地附近兴建旅游度假村。请计算索道线路的水平直线距离，并说明丙地兴建旅游度假村的有利地形条件。（4分）