从技术发展角度看,最早出现的IP电话工作方式是( )。
A.PC-to-PC
B.PC-to-Phone
C.Phone-to-PC
D.Phone-to-Phone
参考答案:A
某汽车客运公司有客车(25座)10辆和客车(60座)15辆,则该公司总座位是()。
A.250
B.900
C.1150
D.1350
– The Internet is really _________ to us. We can easily find different kinds of information.
A.safe
B.quick
C.boring
D.helpful