(  )类制冷剂包括R23、R32、R41、Rl25、R134、R143、R152等。

(  )类制冷剂包括R23、R32、R41、Rl25、R134、R143、R152等。

A.HFA

B.HFB

C.HFC

D.HFD

正确答案是3