预防下颌阻生牙拔除术后肿胀反应,常用药物为()
A.抗生素
B.地塞米松
C.止血敏
D.碘仿海绵
E.阿司匹林
参考答案:B
最易变异的是哪种肝炎病毒()
A.甲型肝炎病毒
B.乙型肝炎病毒
C.丙型肝炎病毒
D.丁型肝炎病毒
E.戊型肝炎病毒
—Mum, it is nice weather. I want to skate this afternoon.
—Don’t you think the ice on the lake is too thin to ________ your weight.
A.stand
B.catch
C.bear
D.take