【单选题】下列关于光纤同轴电缆混合网HFC的描述,错误的是______。
B.
HFC由有线电视头端、长距离干线、放大器、馈线和下引线组成
C.
HFC的数据传输速率可达10~36Mbit/s
D.
HFC通过路由器将用户计算机与同轴电缆连接起来
【判断题】81 普通螺旋传动只能将回转运动转变为直线运动。( )
【简答题】行情软件中,表示股价走势的黄线与白线之间的关系是?
【单选题】下列关于光纤同轴电缆混合网HFC的描述中,错误的是
A.
HFC 通过路由器将用户计算机与同轴电缆连接起来
C.
HFC 的数据传输速率可达10-36Mbps
D.
HFC 由有线电视头端、长距离干线、放大器、馈线和下引线组成
【简答题】A.He is too busy with his job. B.He earns too little to have any form. of recreation. C.He does not like it. D.He watches TV all night long.
【单选题】点击死链接,返回的HTTP状态码一般是( )
【简答题】A.Because he is not interested in the project. B.Because he is too busy to spare some time. C.Because he will leave on a business trip soon. D.Because he needs time to get to know the project.