97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区 狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

單項(xiàng)選擇題

A user reports that a newly installed external CD-RW is not working. Jill, a technician, is called and notes the user has the CD-RW drive, a flash disk, a rarely used external hard drive and a wireless network adapter plugged into an external USB hub.
Which of the following is the MOST likely reason for the problem?()

A. The USB hub needs more USB ports.
B. The USB hub is a version 1.1.
C. The USB hub was not externally powered.
D. The USB hub is a version 2.0.

微信掃碼免費(fèi)搜題