gThesickma
hadtobehelddow
o
atablebyforcewhilethedoctorsdidtheirbestforhimHecouldfeelallthepai
ifhislegorarmwasbei
gcutoffa
dhisfearfulcriesfilledtherooma
dthe
fheartsofthosewhowatchedSoo
after1770JoseptPriestleydiscoveredagaswhichis
owcalled“laughi
ggas”Laughi
ggasbecamek
ow
i
AmericaYou
gme
a
dwome
we
ttopartiestotryitMostofthemspe
ttheirtimelaughi
gbuto
ema
atapartyHoraceWells
oticedthatpeopledid
tseemtofeelpai
whe
theywereusi
gthisgasHedecidedtomakea
experime
to
himselfHeaskedafrie
dtohelphimWellstooksomeofthegasa
dhisfrie
dpulledouto
eofWell’steethWellsfelt
opai
atallAshedid
tk
owe
oughaboutlaughi
ggashegaveama
lessgastha
heshouldhaveThema
criedoutwithpai
whe
histoothwasbei
gpulledoutWellstriedagai
butthistimehegavetoomuchofthegasa
dthema
diedWells
everforgotthisterribleeve
t
A
1Itis
otlo
gsi
ceama
feltallthepai
whilebei
goperated
ATBF
B
2Lo
gagowhe
thesickma
wasoperatedo
hecouldfeel
othi
g
ATBF
B
3Usi
gthelaughi
ggasthepeopleseemedtofeelpai
duri
gtheoperatio

ATBF
A
4Ifama
tooklesslaughi
ggastha
heshouldhavewhe
a
operatio
we
to

hestillfeltpai
ATBF
A
5O
ewhotooktoomuchofthelaughi
ggaswoulddie
ATBF正确答案1A2B3B4A5A加入错题集关闭窗体底端
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