调节红细胞生成的最主要体液因素是()。

A、雄激素
B、雌激素
C、红细胞提取物
D、促红细胞生成素
E、促红细胞生成素
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正确答案:

D

答案解析:

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Iam____gratefulforthemanykindnessesyouhaveshownmyson.

A、excessively
B、much
C、certainly
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A、hadbeencaptured
B、beingalwayscaptured
C、onlytobecaptured
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Theschoolisgoingthe________miletocreatethenextgenerationofsportingstarsthankstoitsuniquedevelopmentprogram.

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B、further
C、supplementary
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TEXTD

Personalityis,tolargeextent,inherent--A-typeparentsusuallybringaboutA-typeoffspring.Butthe

environmentmustalsohaveaprofoundeffect,sinceifcompetitionisimprotanttotheparents,itislikelytobecomeamajorfactorlivesoftheirchildren.OneplacewherechildrensoakupAcharacteristicsisschool,whichis,byitsverynature,ahighlycompetitiveinstitution.Toomanyschoolsadoptthe"winatallcosts"moralstandardandmeasuretheirsuccessbysportingachievements.Thecurrentpassionformakingchildrencompeteagainsttheirclassmatesoragainsttheclockproducesatwo-layersystem,inwhichcompetitiveAtypesseeminsomewaybetterthantheirB-typefellows.Beingtookeentowincanhavedangerousconsequences:rememberthatPheidippides,thefirstmarathonrunner,droppeddeadsecondsaftersaying:"Rejoice,weconquer!".Byfartheworstformofcompetitioninschoolisthedisproportionateemphasisonexaminations.Itisarareschoolthatallowspupilstoconcentrateonthosethingstheydowell.Themeritsofcompetitionbyexaminationaresomewhatquestionable,butcompetitioninthecertainknowledgeoffailureispositivelyharmful.Obviously,itisneitherpracticalnordesirablethatallAyoungsterschangeinto'B's.Thewouldneedstypes,andschoolshaveanimportantdutytotrytofitachild'spersonalitytohispossiblefutureemployment.Itistopmanagement.16.Accordingtotheauthor,whatfactorscontributetothebuildingofpersonality?

A.inheritance

b.inheritance,competitionandenvironment

c.competition

d.environment

17.Whichofthefollowingstatementsisnottrueaccordingtotheauthorofthepassage?

A.Schoolsusuallyadoptseverecompetitivepolicies.

B.Studentsareoftendividedbycompetitionresults.

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D.Thestrongerdesireforwinning,thebetter.

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A.pullup

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c.doubtful

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