24、Airplanes are important in transportation in Canada_____.(2分)A. because they can fly very highB. because they can carry larger freight to the destination within shorter timeC. because they are the newest form of transportD. because they can go to some areas that cannot be reached by other transports

本题考查对加拿大交通特点的理解，需结合地理知识分析。关键点在于加拿大地广人稀，北部地区多为偏远地带，公路和铁路网络不发达。飞机作为交通工具，能直接连接这些区域，满足交通需求。其他选项（如飞行高度、货运效率、运输形式新旧）均未准确反映飞机在加拿大交通中的核心作用。

选项分析

A. because they can fly very high

• 飞机飞行高度并非加拿大交通依赖飞机的核心原因，题目未提及高空飞行的优势，排除。

B. because they can carry larger freight to the destination within shorter time

• 加拿大航空运输以客运为主，货运并非主要需求，且其他运输方式（如卡车、铁路）也能高效货运，排除。

C. because they are the newest form of transport

• 飞机并非“最新”的运输形式（如高速铁路等更新技术存在），且“新旧”与交通需求无关，排除。

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，缺乏公路和铁路，飞机是唯一能快速到达这些偏远区域的交通工具，直接满足交通需求，符合题意。