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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

● 浮點數(shù)的表示分為階和尾數(shù)兩部分。兩個浮點數(shù)相加時,需要先對階,即(1)(n為階差的絕對值)。

（6）A．將大階向小階對齊,同時將尾數(shù)左移n位

B.將大階向小階對齊,同時將尾數(shù)右移n位

C.將小階向大階對齊,同時將尾數(shù)左移n位

D.將小階向大階對齊,同時將尾數(shù)右移n位

● 計算機運行過程中，遇到突發(fā)事件，要求CPU暫時停止正在運行的程序，轉去為突發(fā)事件服務，服務完畢，再自動返回原程序繼續(xù)執(zhí)行，這個過程稱為(  )，其處理過程中保存現(xiàn)場的目的是(  )。

（7）A．阻塞

B.中斷

C.動態(tài)綁定

D.靜態(tài)綁定

（8）A．防止丟失數(shù)據(jù)

B.防止對其他部件造成影響

C.返回去繼續(xù)執(zhí)行原程序

D.為中斷處理程序提供數(shù)據(jù)

●

著作權中，(    )的保護期不受限制

（9）A．發(fā)表權

B.發(fā)行權

C.署名權

D.展覽權

●

王某是某公司的軟件設計師，完成某項軟件開發(fā)后按公司規(guī)定進行軟件歸檔。以下有關該軟件的著作權的敘述中,正確的是(  )

（10）A．著作權應由公司和王某共同享有

B.著作權應由公司享有

C.著作權應由王某享有

D.除署名權以外,著作權的其它權利由王某享有

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