题目

 She would move quietly up to the sparrow on a small tree just to get a better look, her face __________ with childlike expressions at one of God’s simple wonders.   A. shone                  B. shining              C. having shone         D. being shone 答案：B大到核电站、火力发电厂，小到汽车，都是使用水作为散热的物质。用物理知识来说明：这是因为水的_________比其它液体物质大得多的缘故。