时间计算题主要涉及时区、区时、地方时、北京时间、国际标准时间、日出日落时间、昼夜长短、晨昏线、太阳高度等主干知识,该块内容在高中地理中举足轻重,重难点集中,试题变化层出不穷。综合来看,依据命题材料的特点,主要有以下八大类。一、时区图示类呈现时区图中局部重要而又易错部分,以充分 Time calculation questions mainly related to the time zone, district, local time, Beijing time, international standard time, sunrise and sunset time, day and night length, dusk line, the sun and other trunk knowledge, the block content in high school geography important, heavy and difficult to focus, Questions after another Taken together, based on the characteristics of proposition materials, there are mainly the following eight categories. First, the time zone icon class presents a time-zone diagram of the local important and error-prone part of the full