20.
A. causing
B. teaching
C. pretending
D. trying
20 .下列哪一项不是致癌因子A .砷B .金C .铬D .镍E .镉
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Why not ______ again?A、tryB、triedC、triesD、trying
30.In which part of a newspaper would you most probably read the passage?A. Shopping.B.Teaching.C.Family.D.Health.
Teaching, a test of ___________, intelligence, and teamwork skills, requires a lot of energy.A.patience B.position C.privacy D.direction
__________ teaching 辅助教学,促进教学
f__________ teaching 辅助教学,促进教学
20.厌氧菌感染应用A.链霉素B.磺胺类药物C.甲硝唑D.青霉素