• 2022-06-06
    According to the data about the air pollutions in the first quarter in 2015, the average of PM 2.5 in _______ cities in China is about 66, nearly twice than the standard—35, among which _______ cities are more than double the standard.
    A: 364; 144
    B: 365; 143
    C: 366; 142
    D: 367; 141