题目
24. Airplanes are important in transportation in Canada _. A. Because they can fly very high B. Because they can carry larger freight to the destination within shorter time C. Because they are the newest form of transport D. Because they can go to some areas that cannot be reached by other transports
24. Airplanes are important in transportation in Canada _.
A. Because they can fly very high
B. Because they can carry larger freight to the destination within shorter time
C. Because they are the newest form of transport
D. Because they can go to some areas that cannot be reached by other transports
A. Because they can fly very high
B. Because they can carry larger freight to the destination within shorter time
C. Because they are the newest form of transport
D. Because they can go to some areas that cannot be reached by other transports
题目解答
答案
本题考察加拿大航空运输的重要性。A项“飞得高”无关紧要；B项未突出偏远地区需求；C项“最新”不符事实。D项指出飞机可覆盖其他交通方式无法到达的地区，如北部偏远社区，这正是其在加拿大交通中不可替代的原因。综合分析，D项最贴合题意。
答案：D. Because they can go to some areas that cannot be reached by other transports.
解析
本题考查加拿大航空运输的重要性，需结合地理知识分析。解题关键在于理解加拿大特殊的地理环境：国土面积广阔，北部地区人口稀少且交通不便，其他运输方式难以覆盖。因此，飞机能够到达其他交通工具无法到达的偏远地区是其核心作用。
选项分析
A. Because they can fly very high
飞机飞行高度与运输效率无直接关系，且其他运输方式（如火车、汽车）也有各自的运行高度限制，此选项未抓住关键作用。
B. Because they can carry larger freight to the destination within shorter time
虽然飞机速度快、运量大，但加拿大更依赖飞机的并非运量或速度，而是其对偏远地区的可达性。此选项未突出地理环境的特殊性。
C. Because they are the newest form of transport
飞机并非“最新”的运输方式（如高铁、无人机等更现代），且“新旧”并非衡量运输重要性的标准，此选项表述错误。
D. Because they can go to some areas that cannot be reached by other transports
加拿大北部地区地广人稀，公路、铁路等基础设施不足，飞机成为唯一可行的运输方式。此选项直接对应地理环境特点，是正确答案。