搜题请搜索小程序“爱下问搜题”
问题 选择题

—Has the television advertisement worked?

—It did!      orders flooded in.

A．None

B．Some

C．Few

D．More

答案

答案：D

填空题

据统计，2009年十•一期间，我市永丰生态园共接待中外游客的人数为26740人次，将这个数字保留三个有效数字，用科学记数法可表示为______．
查看答案
单项选择题

Packet switching is a method of slicing (71) messages into parcels called“packets，”sending the packets along different communication (72) as they become available，and thenreassembling the packets (73) they arrive at their destination．Prior to the development ofpacket switching，early computer networks used leased，dedicated telephone circuits to (74) with terminals and other computers．In circuit—switched networks such as the telephone system，a complete point—to—point (75) is put together,and then communication can proceed．

A．tracks
B．paths
C．streets
D．channels
查看答案