甲癣可选用()
A.青霉素
B.红霉素
C.林可霉素
D.新青霉素Ⅱ
E.灰黄霉素
参考答案:E
The manager listened to the customers’ complaints attentively with great patience, _____ to miss any point.
A.not trying
B.trying not
C.to try not
D.not to try
()服务的主要作用是实现文件的上传和下载。
A.Gopher
B.FTP
C.Telnet
D.E-mail