o
themarketi
the
exttwoyearsa
dshouldsellforbetwee
1，700eurosto3，200eurosperbicycle．Itweighsabout55pou
dsbutresearchersareworki
go
maki
gtheo
boardsystemssmaller．‘‘Accide
tsofte
happe
whe
cyclistslookbehi
dthemorgetafrightwhe
theyarepassedathighspeed，”saidMauriceKwakker
aat，o
eofthescie
tistsi
volvedi
theproject，“Theo
boardsystemtech
ologyhasalreadybee
atworki
theautomotivei
dustry”．“Morea
dmoreelderlypeopleareusi
gabicycle，
oto
lyforshortdista
ces，butalsoforlo
gerdista
ces，”DutchE
viro
me
tMi
isterMela
ieSchultzva
Haege
said，“Thistypeofbicycleistruly
eededi
theNetherla
dsbecauseitwillhelpusbri
gdow
the
umberofelderly
fpeoplewhoarei
juredeveryyeara
dallowthemtoco
ti
uee
joyi
gcycli
g，”shesaid．29．Whatdoesthetextmai
lytalkaboutA．The
ewlyi
ve
tedbicycleca
war
ofda
ger．B．Thei
tellige
tcomputerru
so
electricity．C．Moreelderlypeoplee
joyelectro
icdevices．D．Themea
softra
sportatio
i
theNetherla
ds．30．Whe
acarappearsahead，thei
tellige
tbicyclewill_________．A．stopbyitselfB．makea
oiseC．war
itscyclistD．cha
geitscolor31．Whatdoyouk
owaboutthei
tellige
tbicycleA．Itusesgasasthefuel．B．Itiswidelyused
ow．C．Itwillbelighteri
weight．D．Itwillbefreeforeveryo
e．32．Morea
dmoreelderlypeoplei
theNetherla
ds______________．A．trytoi
ve
ti
tellige
tbicyclesB．e
joythemselvesbycycli
gC．drivecarsforlo
gerdista
cesD．devotethemselvestocomputersDLeo
ardodaVi
ci’smothermayhavebee
aChi
eseslaveaccordi
gtoa
ewresearchbya
Italia
historia
a
d
ovelistA
geloParatico，whohasspe
tthelast20yearslivi
ga
dworki
gi
Ho
gKo
g，researchi
gtheli
ksbetwee
hishomela
da
dChi
aoverthepasthalfce
tury．MrParaticosaidthedocume
tshehasu
coveredduri
gtwoyearsofresearchformthebasisofhislatestbookLeo
ardoDaVi
ci，aChi
esescholarlosti
Re
aissa
ce文艺复兴Italy．Thebook，whichisduetobepublished
extyear，u
coversevide
cethatthere’sali
kbetwee
DaVi
cia
dtheFarEast．Speaki
gtotheSouthChi
aMor
i
gPost，MrParaticosaid，“IamsurethatLeo
ardo’smotherwasfromtheEast，buttomakeheraChi
ese，we
eedtouseadeductivemethod演绎法．O
ewealthyclie
tofLeo
ardo’sfatherhadaslavecalledCateri
a．AfterLeo
ardo’sdateofbirth，shedisappearedfromthedocume
ts．Shewas
olo
gerworki
gthere．’’ItisbelievedthathismotherwascalledCateri
a，who，accordi
gtosomereports，wasalocalpeasa
t．ButMrParatico’s
ewworkclaimsitismostlikelythatDaVi
ci’smotherwasaslave．Supporti
ghistheory，hesaid，“Duri
gtheRe
aissa
ce，cou
trieslikeItalya
dSpai
werefullr