某医院年终对全院职工的基本情况做调查了解，其中有以下情况：死亡1人，医生甲因病休息1年多，医生乙因医院效益不好也在家闲了不满2年，医生丙出去参与经营未从事医疗2年多，医生丁承包医院的第二门诊近3年，其余大多数仍在医院坚持工作，依据执业医师法，下列人员中，属于应当注销注册，收回医师执业证书的是（）

A.医生甲

B.医生乙

C.医生丙

D.医生丁

E.医生乙和丙

One of the main responsibilities of ICMP is to report （1）. Although technology has produced increasingly reliable transmission media, errors still exist and must be handled. IP is an （2）protocol. This means that error checking and error control are not a concem ofIP JCMP wasdesigned, in part, to compensate for this shortcoming. Howerver, ICMP does not （3）errors, itsimply reports them. Error correction is left to the higher-level protocols. Error messages arealways sent to the original（4） because the only information available in the datagram aboutthe route is the source and destination 1P addresses. ICMP uses the source IP address to send theerror massage to the source of the （5）

（1）是（）

A.numbers

B.functions

C.strings

D.Errors