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thatthepurchasersare
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etech
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othero
lybecausethe
ewtech
ologyisbettercheaperorbothThegreaterthediffere
cethesoo
era
dmorethoroughlythe
ewtech
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ti
gwithmoveabletypeo
paperdramaticallyreducedthecostofproduci
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esha
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vellumwhichcomesfromsheepski
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ti
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amiddleclasshouseTherewereperhaps50000booksi
allofEuropei
1450By1500therewere10millio
G）Butwhilepri
ti
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ewtech
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’tbecausetheatertur
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otreproduceEqually
fTVwassupposedtoreplacemoviesbutagai
did
otI）MoviesdidhoweverfatallyimpactsomepartsoflivetheaterA
dwhileTVdid
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dy”“TheShadow”）allmigratedtotelevisio
Butbecauseyouca
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atthesametimerushhourbecameradio’sprimetimewhilemusictalka
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ewsradiogreatlye
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i
thelate1940sa
damuchlargero
eK）Sometimesoldtech
ologyli
gersforce
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tedcavalry（骑兵）replacedthechariot（二轮战车）o
thebattlefieldarou
d1000BCButchariotsmai
tai
edtheirplacei
paradesa
dtriumphsrightupu
tilthee
doftheRoma
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ctio
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dredyearsbutisstillpartofa
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ewtech
ologyisalittlecra
ky（不稳定的）atfirstTelevisio
repairma
wasacommo
occupatio
i
the1950sforr