问题 多项选择题

关于Klinefelter综合征的临床表现,叙述正确的有()。

A.血LH、FSH水平低于正常

B.睾丸体积小于4ml

C.成年后血睾酮浓度低于正常

D.睾丸活检呈玻璃样变性

E.染色体核型为48,XXXY

答案

参考答案:B, C, D, E

阅读理解

TheUnitedStateshasaround475,000schoolbuses.Eachdaytheycarrymorethan25million children,halfofalltheschoolchildreninthecountry.

Thesebuses,onaverage,use4litersofdiesel(柴油)fueltotravellessthan16kilometers. When theschoolyearbeganlastfall,dieselaveraged55centsaliternationally.Thepricenearlydoubledby theendofschool inJune.

BobRileyisthespokesmanfortheAmericanSchoolBusCouncil.Hesaysfuelpricesnegotiated(商议) for schools arenot lower thanothers have to pay. Asaresult,schoolsarelookingfor waystoreducetransportationcosts.Busroutesarebeing redrawnor,insomecases,canceled.Someareas arebuyingbusesthatuse naturalgas orother alternativefuels.

Otherstepsincludefewerfieldtrips andlesstravel bysports teams.Someschool districtsmayend any busservicenotrequiredby law.

Studiesshowthatschoolbusesarethesafestform oftransportationtoandfrom school.

The AmericanSchoolBus Councilsayscutsinbus serviceare badfor childrenandpossiblythe environment.Itsaysremovingbusesfromtheroadwillmeananincreaseinothervehiclestransporting students. Spokesman Bob Riley saysanotherconcern is thatreducing  busservicemightreduce attendance.

It couldalso getmorechildren to walkor bicycle to school.That wouldsurely makepeople happy attheNationalCenterforSafeRoutestoSchool.Morekidswalkingorbikingsafelytoschoolisthe aimofa3-year-oldfederal program,partofaninternationalmovement.Thegoalis toincreasephysical activity and reduce air pollution.

小题1:Inthesecondparagraph,theauthorwantsto provethat   .

A.toomany schoolchildren takebuses every day

B.thecost offuelhasincreased

C.theschoolbusesconsumemorefuelthanaverage

D.the school busesusuallygoon long routes小题2:Inthe thirdparagraph,what doesBobRiley mean'?

A.Thefuel pricesforschool busesneed to be negotiated again.

B.High fuelprices are also affecting the efficiency of their services.

C.The fuelprices for school are much higher thanothers pay.

D.TheAmericanSchool BusCouncilshould workforstudents’benefit.小题3:Whatistheadvantage ofreducingschoolbusserviceaccordingto thepassage?

A.Morefuelwillbesaved.

B.Studentscangotoschool inasaferway.

C.Studentscanexercisebywalkingorriding toschool.

D.Trafficjams willbereducedduringrushhour.小题4:Whatisthesixth paragraphmainly about?

A.Bob Riley's concern about the resultsof reducing school buses.

B.Theconvenience brought by school buses.

C.Thebad effectsofreducingschool buses.

D.Thestudiesabout students'choicescarried out by theAmericanSchool BusCouncil.

填空题