1. [单选题]下列标准代号中，______为推荐性行业标准(commendatory trade standards)的代号。
A. SJ/T
B. Q/T11
C. GB/T
D. DB11/T
2. [单选题]One use of networks is to let several computers share______such as file systems, printers, and tape drives.
A. CPU
B. memory
C. resources
D. data
3. [单选题]用于配置交换机或路由器的concole线缆类型为？
A. 直通缆
B. 交叉缆
C. 反转线
