A.HRB235>HRB335>HRB400=CRB550 B.CRB550=HRB335>HRB400>HRB235 C.CRB550=HRB400>HRB335>HRB235 D.CRB550≥HRB400>HRB335>HRB235
A.HRB235>HRB335>HRB400>CRB550 B.CRB550>HRB335>HRB400>HRB235 C.CRB550>HRB400>HRB335>HRB235 D.CRB550>HRB335>HRB235>HRB400
A.提高降低 B.提高提高 C.降低降低 D.降低提高