单项选择题 A customer, Jill, has a dim image on her internal LCD panel, but when connecting to an external display, the image is fine. Which of the following is MOST likely the cause?（）

单项选择题 A user attempts to login to a bookmarked site but is prompted for their social security number,mother’s maiden name and date of birth. Which of the following has MOST likely happened?（）

单项选择题 A computer’s onboard LPT1 port fails. Which of the following I/O cards should be installed to fix this problem?（）