最柞易引起再生障碍性贫血的药物是
A．氯霉素
B．磺胺嘧啶
C．环磷酰胺
D．保泰松
E．他巴唑(甲巯咪唑)
参考答案：A
简述麻疹暴发疫情的概念？
－What’s the trouble this time?(西城区)
－Well,doctor,I just can’t_______this terrible dream every night.
A．get out of
B．get away with
C．get down to
D．get through
