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a, a a, the an, a an, the
it can be made cost-effectively． it can leave voice messages， it makes online shopping easy it makes fraud difficult．
“May I have your ID card？” “please show me your boarding card” “please take back your boarding card” “ID card，please.”
where is your ID card where your ID card is y
rechargeable card IP card ID card Prepaid card
Its owner can change the ID code freely. Its user does not need to key in the ID number. It can record its user’s spoken password. It still can be used by someone else after being stolen.
a, his an, you an, her a, my
It recognizes only its owner’s spoken password． It doesn’t need to work with an online server It requires less ID information． It has a playback function
Only female voice passwords could be recognized． Further improvement should be made to extend battery life There is no limit to its application． Female customers like to use it
Its owner can change the ID code freely Its user does not need to key in the ID number． It can record its user’s spoken password． It still can be used by someone else after being stolen．
It is too large． It is toot hick It can’t be used in online transactions It doesn’t have a loudspeaker．
It recognizes only its owner’s spoken password. It doesn’t need to work with an online server. It requires less ID information. It has a playback function.
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