Mission impossible: Dr Robert Goddard was mocked for using a blackboard at Clark University in Worcester, Massachusetts, in 1924, to describe how man flying to the Moon would one day be possible
1924年，当罗伯特·戈达德博士在马萨诸塞州伍斯特市克拉克大学的黑板上演示将来如何把地球人送上月球时，他被嘲笑成是痴人说梦
Using the traditional way of blackboard and billboards posted there has obviously deficiencies.
采用传统的黑板和宣传栏张贴的方式存在明显的不足。
Using multi-media projector and writing on the blackboard.
采用多媒体投影结合板书教学；
Using multi-media projector and writing on the blackboard.
采用多媒体投影结合板书教学；
应用推荐