互动封闭仿真课堂
1、智能交互 2、电子板书式视频教学 3、在线互动问答 4、封闭课堂启发式教学方式
随堂测试、知识梳理、易错点揭示、总结启迪智能错题本
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升级服务
在线答疑、课后同类题练习、讲义下载、短信提醒40. all through the year = all the year round 一年四季 throughout the year
41. rise by 63 meters 上升了63 米 by 表示“相差程度”
42. as a result /consequence of 由于…的结果
43. date from = date back to 追溯于; 始建于
This temple dates from the Song Dynasty.
The temple, dating back to the Song Dynasty, will be pull down.
44. in danger 处于危险中; out of danger 脱离危险
45. be carved in rock 被刻在岩石上
46. make a plan for 为…制订计划
47. stone by stone 一块石头一块石头地 one by one
48. in all = in total =altogether 总共
49. be marked with 被标上…记号
50. Three Gorges Dam 三峡大坝
51. The Temple of Heaven 天坛
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