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Thebicycleisoneofthesimplestyetmostusefulinventions(发明)intheworld.WhatismostsurprisingisthatitwasnotinventedearlieralthoughthegreatinventorLeonardodaVincihaddrawn
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问题描述:

(1)

(2)

(3)

  Thebicycleisoneofthesimplestyetmostusefulinventions(发明)intheworld.WhatismostsurprisingisthatitwasnotinventedearlieralthoughthegreatinventorLeonardodaVincihaddrawnpicturesforbicyclesandalsoforflyingmachinesandsomeotherthings.Thosethingswerenotproduced(生产)untillongafterhedied.

  Apersonridingabicycleuseslittleenergy(能量)tomakethebicyclemoveandthereisnopollution(污染)atallwhenyouareriding.Evensoindevelopedcountriesmostpeopledon’ttraveltoworkbybicycle.Itisnotbecausethebicyclesareexpensiveorpeoplefeeltirediftheyridetowork.It’sbecausethenumberofcarsontheroadsbecomeslarger.Itcertainlybecomesmoredangeroustorideabicycle.Asaresultmorepeopleputtheirbicyclesawayandgotoworkintheircarsandinthiswaythesituation(情形)ismademoreserious.Perhapsthebestwaytomakeridingsaferandmorepopularistocreatepaths(开设通道)onlyforbicyclesandtomakeitsodifficultandexpensivefordriverstotaketheircarsintothecitythattheywillgobacktousingtheirbicycles.

Bicycleswasinvented________.

[  ]

A.

byLeonardodaVinci

B.

longbeforeLeonardodaVincidied

C.

soonafterLeonardodaVincidied

D.

longafterLeonardodaVincidied

Ifyouwanttomakethebicyclemoveyouneed________.

[  ]

A.

rideashardasyoucan

B.

noenergyatall

C.

littleenergy

D.

quitealotofenergy

陈少民回答:
  答案:1.D;2.C;3.A;4.D;5.B;
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