PC机鼠标是采用串行方法的输入设备,现行PC机鼠标与主机的连接接口大多采用( )。
A.COM1 口
B.COM2 口
C.PS/2 口
D.Centronics 口
参考答案:C
There were about six __________ students in the school building during the earthquake, and __________ of them
didn't run out.[ ]
A. hundred; two third
B. hundred ; two thirds
C. hundreds; two thirds
D. hundreds; two third
不属于结构化程序设计方法主要原则的是( )。
A.自顶向下
B.自底向上
C.模块化
D.限制使用goto语句