高一英语同步课程
《完形填空之词语辨析》麻雪玲
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老师传授典型题详细办法
教学生举一反三
一题多解、一题巧解
错题本
错题追踪复习
听课中的错题能自动加入错题本
课后可方便复习及导出错题本
网络答疑
课程互动性强
在线互动问答
数理化英快速答疑
课后练习
经典例题课后练习
老师针对课堂中的经典例题
为学生推送同类型题，掌握解题方法
When it’s 10:15 in New York, it’s 9:15 in Salt Lake City, and 7:15 in San Francisco – isn’t it? This consistent and orderly time system, based on a grid of time 21 , seems so natural that people 22 give it a moment’s thought. So you may find it surprising to learn that prior to the late 1800s each community 23 its own time – by looking at the sun. When the sun shone directly overhead in Washington, D.C., for example, it was 12:00 noon there; up the road in Philadelphia, 24 , it was 12:07, and in Boston it was 12:24. To measure time with absolute accuracy, it is necessary to move the clock about one minute for every twelve miles of distance; so according to “sun time” your pocket watch would be slightly 25 if you ventured only a few miles down the road.
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