—“Could we put off the meeting？” she asked

—“     ,” he answered politely. “This is the only day everyone is available. ”

A．Not likely

B．Not exactly

C．Not nearly

D．Not really

为了电子病案安全使用，安全级别较高的识别身份的方法是（）.

A.用户名/口令技术

B.电子密钥技术

C.第三方发放电子证书识别

D.个人生理特征识别技术

E.电子签名识别技术