?? ???? ?? ???? ?? ???? ??? ?? ? ?? ?????Some lenses, termed zoom lenses, have a focal length that may differ as internal factors are moved, generally by rotating the barrel or urgent a button which activates an electric motor. Generally, the lens might zoom from moderate broad-angle, as a result of standard, to reasonable telephoto; or from ordina

Purchasers of various age groups have various perceptions of the risk factors of shopping online.[22] Buyer buying conduct in electronic ecosystem???? ??? ?? ??? ??? ??????. ??? ??? ??? ?? ??? ? ????. ????? ??? ? ? ?? ???? ?? ??? ??? ?? ????.???? ???????? ??? ??? ???? ???? ??? ?? ???? ? ????? ??? ?? ??? ???? ????.???? ????????? ?? ?? ????? ???? ??

?? ?? ?? ?? ?? ??? ?? ??? ?? ?? ?? ?? ???????? ???????. ??????? ??? ??? ???? ??? ??? ????? ????. ? ???? ???? ??, ??, ???? ????? ???. ???? In several reports, perceived value, purchasing style, and brand have faith in are the primary variables that have an effect on on line people' choices.[27]  The perceived benefit implies that individuals can Re

??? ???? ?? ???? ????. ??? ?? ???? ??? ?? ??, ?? ???? ????.????? ?? ??? ??????? ?? ?????? ??? ???.In several scientific tests, perceived value, buying fashion, and brand rely on are the leading things that affect on the net buyers' decisions.[27]  The perceived price signifies that people can Look at the merchandise and prices on-line, bringing th

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