妊娠期间淋病患者对先锋霉素V过敏的治疗选用 ()
A.青霉素
B.头孢曲松钠
C.大观霉素
D.喹诺酮类
E.林可霉素
参考答案:B
解析:二线药物大观霉素为孕期禁用。
— _______ there any American teachers in your school?
— _______ only one. [ ]
A. Are ; Yes, there are
B. Are; No, there is.
C. Is; No, there isn't
D. Are; Yes, there is
下列气体中不能用NaOH固体干燥的是( )
A.CO
B.H2
C.CO2
D.O2