【简答题】Spanning the novels is Cha's great theme, Chinese i___14___。
【简答题】A.He is working hard all the time. B.He is lazy all the time. C.He works hard so as to get his three meals. D.He often has his three meals on time.
【多选题】下列表述中,对波阻抗描述错误的是( )。
【单选题】He is working hard for fear that he __.
【简答题】电力二极管的基本工作原理为____,常见的电力二极管主要有____、____、____。
【单选题】He is working hard for fear that he___.
【简答题】加里培林认为,心智技能的形成过程包括五个阶段:活动定向阶段、物质活动或物质化活动阶段、有声的言语活动阶段、( )、( )。
【单选题】Because he is working hard, he has been to the position of department manager.
【单选题】He is working hard.这个句子中is是( )。