人参具有中枢兴奋作用的化学成分是
A.人参皂苷Ra类B.人参皂苷Rb类C.人参皂苷Re类D.人参皂苷Rf类E.人参皂苷Rg类
参考答案:E
When my parents were young, they had to ________ several miles every day to school since they had no
money to buy a bike.[ ]
A.occupy
B.cover
C.get
D.make
依照《医疗事故处理条例》,应患者要求复印或者复制病历等资料时( )
A.经医疗事故鉴定委员会批准
B.由患者拿走自行复印
C.医疗机构提供复印或复制,患者应在场
D.由医疗机构整理复印后交给患者
E.经卫生行政部门批准,可以复印或复制