●With circuit switching a __(1)__path is established between two stations for communication . Switching and transmission resources within the network are __(2)__for the exclusive use of  the circuit for the duration of the connection . The connection is__(3)__：Once it is established ，It  appears to attached devises as if there were a direct connection. Packet switching was  designed to  provide a more efficient faciltiy than circult switching for (   ) data tratffic.  Each packet contains some portion of the user data plus control information needed for proper functioning of the network. A  key distinguishing element of packet_switching networks is  whether the internal operation is datagram or virtual circuit . With internal virtual circuits,a route is defined between two endpoints and all packets for  that virtual circuit follow the__(4)__ route, With internal datagrams,each packet is treated independently,and packets intended for the same destination may follow different routes.

（1）A．unique

B. dedicated

C. nondedicated

D.independent

（2）A．discarded

B. abandoned

C. reserved

D. broken

（3）A． indistinct

B.direct

C.indirect

D. transparent

（4）A．casual

B.bursty

C.limited

D.abundant

（5）A． same

B. different

C. single

D.multiple

● 浮点数的表示分为阶和尾数两部分。两个浮点数相加时,需要先对阶,即(1)(n为阶差的绝对值)。

（6）A．将大阶向小阶对齐,同时将尾数左移n位

B.将大阶向小阶对齐,同时将尾数右移n位

C.将小阶向大阶对齐,同时将尾数左移n位

D.将小阶向大阶对齐,同时将尾数右移n位

● 计算机运行过程中，遇到突发事件，要求CPU暂时停止正在运行的程序，转去为突发事件服务，服务完毕，再自动返回原程序继续执行，这个过程称为(  )，其处理过程中保存现场的目的是(  )。

（7）A．阻塞

B.中断

C.动态绑定

D.静态绑定

（8）A．防止丢失数据

B.防止对其他部件造成影响

C.返回去继续执行原程序

D.为中断处理程序提供数据

●著作权中，(    )的保护期不受限制

（9）A．发表权

B.发行权

C.署名权

D.展览权

●王某是某公司的软件设计师，完成某项软件开发后按公司规定进行软件归档。以下有关该软件的著作权的叙述中,正确的是(  )

（10）A．著作权应由公司和王某共同享有

B.著作权应由公司享有

C.著作权应由王某享有

D.除署名权以外,著作权的其它权利由王某享有