The following is advantages of emails except ______. <br />A.they can be sent globally to several people at once <br>B.they can be sent any time and saved in an electronic mailbox <br>C.they can be sent at any time and held in a mailbox

The following is advantages of emails except ______.
A.they can be sent globally to several people at once
B.they can be sent any time and saved in an electronic mailbox
C.they can be sent at any time and held in a mailbox

出自：国家开放大学婚姻家庭法学

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