【单选题】将动能通过摩擦转变为热能的制动方式称为( )。
【单选题】将动能通过摩擦转变为热能的制动方式称为( )。
【简答题】adj. 极好的;非常成功的 n.横幅;标语
【简答题】听短文,选答案。 1. Where did Jack worked? A. A hospital. B. A factory. C. A school. 2. Jack got his money in a ______. A. paper bag B. pocket C. book 3. Who did Jack go to see when he found there was not eno...
【简答题】产生 激光的必要条件是使处于高能态的粒子数____处于低能态的粒子数,即粒子数的反转分布。
【单选题】“Jack, did you see all the acts?” “No. When I got to the theatre, they were already playing ______.”
【简答题】职务相当的人,职能相当的事 容光焕发的,喜悦的 n.横幅 adj.极好的,非常成功的 讽刺 善于分析的,头脑周密的 弄碎,瓦解 突然烧旺,发怒,爆发 人,起诉人 有独创性的,别出心裁的 反驳