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puzzled adj. 困惑的，茫然的 puzzling adj.令人困惑的
be/ feel puzzled about sth. 对…感到困惑
Lucy looks a little _puzzled_. He felt puzzled about the question.
The question puzzled me. = I was puzzled by the question.
( B )The __________ look in his face suggested that he_________ that.
A. puzzling; hasn’t expected B. puzzled; hadn’t expected
C. puzzling; doesn’t expect D. puzzled; didn’t expect
puzzle, interest, surprise, astonish, shock, upset, excite, disappoint, please, satisfy, frighten, amaze, convince 等意思为“使??????”的动词都属于同一类，现在分词表主动，可译为“令人??????的”， 过去分词表被动，表示“(本身)感到??????的”
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