交感神经兴奋时可引起
A. 瞳孔缩小
B.逼尿肌收缩
C.消化道括约肌舒张
D.孕妇的子宫平滑肌收缩
E.支气管平滑肌收缩
参考答案:D
用ELISA法检测乙型肝炎抗原、抗体系统结果为HBsAg(-)、抗-HBs(+)、HBeAg(-)、抗-HBe(-)及抗-HBc(+),提示 ()
A.急性乙肝感染趋向恢复
B.既往感染恢复期,有免疫力
C.既往感染恢复期,无免疫力
D.既往感染或接种过疫苗,有免疫力
E.既往感染或接种过疫苗,无免疫力
—How does Bob usually go to work?
—He _______ take a bus, but now he is used to (习惯于) walking. [ ]
A. used
B. was used to
C. used to
D. is used to