根据《处方管理办法》,医疗机构处方保存期限为2年的有
A.医疗用毒性药品处方
B.普通处方
C.急诊处方
D.儿科处方
E.第二类精神药品处方
参考答案:A,D
解析:BCE处方保存一年。
Every few years, the coal workers ______their lungs X-rayed to ensure their health.[ ]
A. are having
B. have
C. have had
D. had had
下列软件中不能用于网络嗅探的是______。
A.TCPdump
B.Wirshark
C.Ethercat
D.MRTG