【简答题】Flying over a desert area in an airplane, two scientists looked down with trained eyes at trees and bushes. After an hour's 11 one of the scientists wrote in his book, "Look here for 12 metal. " Scien...
【单选题】Section C Before I start today's lecture on vegetation, I'd like to tell you about a summer camp — it is a science camp for one【11】______. The purpose is to offer you a chance to study plants, trees a...
【简答题】根据听到的内容填入所缺的单词。 This is a special 1._____. A11 the students at this school work on different things. The students in the 2._____ class are learning about plants and they are growing plants in a greenh...