unix系统中 在使用匿名登录ftp时，用户名为

A. 4

B. 2

C. 3

D. 1

A. 对

B. 错

A. 安全组

B. IP地址

C. DNS

D. 网关

A. WHERE NAME ! NULL

B. WHERE NAME NOT NULL

C. WHERE NAME IS NOT NULL

D. WHERE NAME!=NULL

A. select* from T where col1=1 or col2=2;

B. select* from T where col2=2;

C. select* from T where col1=1;

D. select* from T where col1=1 and col2=2;

A. 11CU

B. 20CU

C. 10CU

D. 15CU

A. 对

B. 错

A. curl http://127.0.0.1:3002/api/stats/usage

B. curl http://127.0.0.1:3002/api/usage

C. curl http://127.0.0.1:3002/api/stats/usages

D. curl http://127.0.0.1:3002/api/usages

A. 对

B. 错

A. a

B. i

C. o

D. p