36.Whatismostremarkableabouttheproposal,madebythetWOscientists?.

　　A.Itisgivenapatrioticname.

　　B.Nolawofphysicsisviolated.

　　C.Itisbasedonexistingtechnology．

　　D.CarbondioxideCanbeconvertedintofuel

　　答案：D

　　37.Whatisthebiggestproblemwithhydrogen-poweredcars?

　　A．Thereisnocheapsourceofhydrogen．

　　B.Theremightbeasafetyprobleminhydrogenproduction．

　　C．Theymaystillbeacauseofglobalwarming．

　　D．Theyarenotsuitableforlong-distancetravel．

　　答案：C

　　38．Ifwhatisproposedbythetwoscientistsbecomestrue,___________________.

　　A．airpollutionwill,becomeathingofthepast

　　B.therewillbenoneedforgasolinesubstitutes

　　C.peoplewillbeabletousemuchcheaperengergy

　　D．therewillbenomorebiofuel-poweredvehicles

　　答案：B

　　39.WhichofthefollowingCallbestdescribetheattitudeofMartinIHofferttotheproposal?

　　A．Indifferent．B.Positive.C．Suspicious．D．Critical．

　　答案：B

　　40.Thepassageismainlywrittento________________.

　　A.introduceanewconcept

　　B．comparedifferentenergysources

　　C．stresstheimportanceofgasoline

　　D．discuSSsolutionstOglobalwarming

　　答案：A