我国国家机关领导人的专职秘书属于( )
A.私人秘书
B.私职人员
C.公务秘书
D.兼职秘书
参考答案:C
Mr. Crossett was made __________ his experiment because of his poor health and old age.
A.give up
B.giving up
C.to give up
D.given up
以下属于接收电子邮件服务器协议的是()。
A.SMTP
B.POP3
C.UDP
D.HTML