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dress sb. (in sth.) 或 be dressed (in sth.) 注意：穿的衣服接在in之后。
Mother dressed her baby and then they went downstairs.
(4) have on 表示穿着的状态，注意不能用进行时。
At the Spring Festival, all children have on new clothes.
(5) be in表示穿着的状态 There was a girl in red.
(6) try on 试穿 Mother was trying on a new dress.
③ 号召；呼吁；要求 The President called on his people to serve the country.
(3) call up
① 给……打电话 (英 ring up) I tried to call you up last night, but no one answered the phone.
② 征召入役；调用 (后备部队) Three boys in our street were called up last week.
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