【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
【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.