【简答题】汽车维护的指导原则是: “( )、( )、( )”。
【判断题】The bigger your topic is, the better your speech is.
【单选题】凹透镜是( ),实物经其只能成虚像,虚像不能用屏接收。
D.
半反半透镜 4、凸透镜焦距的测量方法有( ABC)。 A、自准法 B、物距像距法 C、位移法(共轭法) D、会聚法
【判断题】Stating your topic is vitally important to the speech introduction.
【简答题】please make a mini speech around the topic: The Qualities of Being a Successful Politician ", and deliver your speech which is no less than 1.5 minutes (请上传录音作品)
【单选题】凹透镜是 ( ) ,实物经其只能成虚像,虚像不能用屏接收。
【判断题】Your speech topic is determined by the occasion, the audience and the speaker's qualifications.