【简答题】用括号内所给动词的适当形式填空 1. I am sorry ___________ (hear) that your mother was ill yesterday. 2. After finishing ___________ (do) her homework, Lucy went out. 3. If it ___________ (rain) tomorrow, he won't go ...
【简答题】A.No, I don't think so. B.Yes, he's very well. C.Yes, he was there yesterday. D.No, I was ill yesterday.
【判断题】祖母绿型其特点是有利于增加宝石浓艳鲜亮的色彩,因而常用于琢磨色彩鲜艳、透明度好的宝石材料。
【判断题】祖母绿琢型属于典型的阶梯式款式,即主要由阶梯状的平行反光小面组成,其特点是有利于增加宝石浓艳鲜亮的色彩,因而常用于琢磨色彩鲜艳、透明度好的宝石材料。
【多选题】下列流场区域中,热量传递主要依靠导热的是:
【多选题】下列流场区域中,热量传递主要依靠导热的是: