The China National Environmental Monitoring Center ____ air quality in urban areas from levels
one to five: excel-lent, fairly good, slightly polluted, poor and dangerous.[ ]
A. distributes
B. arranges
C. classifies
D. divides
答案:C
The China National Environmental Monitoring Center ____ air quality in urban areas from levels
one to five: excel-lent, fairly good, slightly polluted, poor and dangerous.[ ]
A. distributes
B. arranges
C. classifies
D. divides
答案:C