题型:问答题 简答题 _____ of the land in that district _____ covered with trees and grass.A. Two fifth, isB. Two fifth, are C. Two fifths, is D. Two fifths, are 查看答案
题型:问答题 简答题 ()结构紧凑,重量轻,转速范围宽,能适应于高环境温度下运行,广泛应用于汽车空调系统中。A.斜盘式制冷压缩机B.滑片式制冷压缩机C.滚动转子式制冷压缩机D.涡旋式制冷压缩机 查看答案