孔隙度是为了衡量岩石中()体积大小以及发育程度而提出的概念。
A、孔隙
B、岩石
C、渗透
D、盖层
参考答案:A
从所给的六个单词中选出五个补全对话。(共5小题,每小题1分)
A; same B; visit C; Where D; Who E; Enjoy F; Really
A: Hi, Tina. 小题1: ______are you going during the holiday?
B:Beijing.
A: 小题2:_______? What are you going to do there?
B: I'm going to 小题3: ________ the Tian’anmen Square, the Summer Palace and the Great Wall. What about you, Gary?
A: I'm going to Hong Kong.
B: It is a great city. 小题4:________ your holiday!
A: The 小题5:__________.
燃料中的主要可燃元素是()。