单项选择题
（）systems can identify individuals with a high degree of certainty.
A.Encryption B.Biometric C.Password Authentication D.Digital
单项选择题 Serial ATA (SATA) uses a （）wire interface that creates a point-to-point connection between devices.
单项选择题 Which of the following computer ports supports hot swapping?（）
单项选择题 USB 2.0 supports a maximum data transfer speed of （）Mbps.
