To study the damage of lung tissue induced by cooking oil fume(COF),the pathomorphological varians of lung tissue were observed,and the activities of superoxidase dismutase(SOD) and the levels of malondialdehyde (MDA),zinc,iron and copper in serum and lung tissue were determined in 54 rats,which were randomly averagely devided into 3 test groups,such as exposure group dynamically inhaling (43±4)mg/m 3 COF,negative control group inhaling heated air (24~28 ℃),and positive control group infused by benzo(a)pyrene.All of the observations and deter...