单项选择题
A. “Did you log in with an administrator account?”
B. “Have you been to any inappropriate websites?”
C. “What have you changed since the optical drive worked properly?”
D. “What has changed since the optical drive worked properly?”
单项选择题 A person calls in asking for the name of the vendor that the technician uses for the organizations firewall hardware. Which of the following is the BEST action for the technician to take?（）
单项选择题 If a technician is getting frustrated during a support call, which of the following could the technician employ to avoid irritating the customer?（）
单项选择题 When dealing with customers on the phone that are not very comfortable with technology, which of the following techniques would be MOST helpful to ensure that effective communication is taking place?（）