【单选题】关于气体热现象的微观解释,下列说法中错误的是( )
A.
密闭在容器中的气体,在某一时刻向各个方向运动的气体分子数目基本相等
B.
大量气体分子的速率有大有小,但是按“中间多,两头少”的规律分布
C.
气体压强的大小跟气体分子的平均动能、分子的密集程度这两个因素有关
D.
一定质量的理想气体,温度不变,体积减小时,气体的内能一定增大
【单选题】Is this school ____ you studied at ten years ago?
【单选题】Ten years ago, Lin left for the US to study ____ at Princeton University.
【单选题】Ten years ago, Lin left for the US to study ___ at Princeton University.
【简答题】根据要求完成句子。 1.They married ten years ago. (变为同义旬) They _____ _____ _____ _____ ten years ago. They _____ _____ _____ _____ ten years. 2. The boss told the little boy to finish the hard work. ( 变为被动语态)...
【单选题】It was ______ I left my hometown and moved to Hangzhou.