【单选题】 Lead accumulation worldwide decreased significantly after the use of unleaded gas in the US ______.
A．was discouraged
B．was enforced by law
C．was prohibited by law
D．was introduced
A．was discouraged
B．was enforced by law
C．was prohibited by law
D．was introduced
【单选题】 The young man was under the ______ that he was Napoleon.
A．fantasy
B．imagination
C．fallacy
D．delusion
A．fantasy
B．imagination
C．fallacy
D．delusion
【单选题】 In his research at Columbia University, Charles Townes worked with all of the following EXCEPT _________.
A．stimulated emission
B．microwaves
C．light amplification
D．a maser
A．stimulated emission
B．microwaves
C．light amplification
D．a maser
【单选题】 Look at the clock! It's time ______ work.
A．we started
B．we'll start
C．we're starting
D．we have started
A．we started
B．we'll start
C．we're starting
D．we have started
【单选题】 From the passage we can learn that MDC Company always ______.
A．keeps its promise
B．provides the same products
C．sells its products at a low price
D．delivers its products without delay
A．keeps its promise
B．provides the same products
C．sells its products at a low price
D．delivers its products without delay
【单选题】
A、Hire a gardener.
B．Get a better attitude.
C．Buy a new tool.
D．Plant more trees in the yarD、
A、Hire a gardener.
B．Get a better attitude.
C．Buy a new tool.
D．Plant more trees in the yarD、
【单选题】 According to the passage, standardized tests work most effectively when ______.
A．the user knows how to interpret the 'results in advance
B．the objectives are most clearly defined
C．the persons who take the test are intelligent or skillful
D．they measure the traits or qualities of the tests
A．the user knows how to interpret the 'results in advance
B．the objectives are most clearly defined
C．the persons who take the test are intelligent or skillful
D．they measure the traits or qualities of the tests
【单选题】 Having two eyes instead of one is particularly useful for ______ .
A．seeing at night
B．seeing objects far away
C．looking over a wide area
D．judging distances
A．seeing at night
B．seeing objects far away
C．looking over a wide area
D．judging distances
【单选题】thE kiDsCAn’t hElp it
thEy sAy you nEvEr EsCApE high sChool.AnD For BEttEr or worsE, sCiEnCE is lEnDing somE CrEDiBility to thAt olD sAw. thAnks to sophistiCAtED imAging tEChnology AnD A numBEr oF longituDinAl (纵向的) stuDiEs, wE’rE lEArning thAt thE tEEn yEArs ArE A pErioD oF CruCiAl BrAin DEvElopmEnt suBjECt to A host oF EnvironmEntAl AnD gEnEtiC FACtors. this EmErging rEsEArCh shEDs light not only on why tEEnAgErs ACt thE wAy thEy Do, But how thE ExpEriEnCEs oF ADolEsCEnCE—From rEjECtion to BingE Drinking (酗酒)—CAn AFFECt who wE BEComE As ADults, how wE hAnDlE strEss, AnD thE wAy wE BonD with othErs.
onE oF thE most importAnt DisCovEriEs in this ArEA oF stuDy, sAysDr. FrAnCEs jEnsEn, A nEurosCiEntist At hArvArD, is thAt our BrAins ArE not FinishED mAturing By ADolEsCEnCE, As wAs prEviously thought.ADolEsCEnt BrAins "ArE only ABout 80 pErCEnt oF thE wAy to mAturity," shE sAiD At thE AnnuAl mEEting oF thE soCiEty For nEurosCiEnCE in novEmBEr. it tAkEs until thE miD-20s, AnD possiBly lAtEr, For A BrAin to BEComE Fully DEvElopED、
An ExCEss oF grAy mAttEr (thE stuFF thAt DoEs thE proCEssing) At thE BEginning oF ADolEsCEnCE mAkEs us pArtiCulArly BrilliAnt At lEArning—thE rEAson wE’rE so gooD At piCking up nEw lAnguAgEs stArting in EArly ChilDhooD—But Also pArtiCulArly sEnsitivE to thE inFluEnCEs oF our EnvironmEnt, Both EmotionAl AnD physiCAl. our BrAins’ proCEssing CEntErs hAvEn’t BEEn Fully linkED yEt, pArtiCulArly thE pArts rEsponsiBlE For hElping to ChECk out impulsEs AnD ConsiDEring thE long-tErm rEsults oF our ACtions. "it’s likE A BrAin thAt’s All ChEErED up not knowing whErE it nEEDs to go," sAys jEnsEn.
it’s pArtiAlly BECAusE oF this DEvElopmEntAl timElinE thAt A tEEn CAn BE so quiCk to think oF A stinging rEmArk, or A Biting insult, AnD so uninhiBitED in Firing it oFF At thE nEArEst unFortunAtE tArgEt—A FormEr FriEnD, pErhAps, or A BEwilDErED pArEnt. thE impulsE to hurl An insult is thErE, just As it mAy BE For An ADult in A strEssFul situAtion, But thE BrAin rEgions thAt An ADult might rEly on to stop himsElF From sAying somEthing CruEl just hAvEn’t CAught up.
in A pApEr puBlishED lAst yEAr in thE journAl oF thEAmEriCAnACADEmy oFChilD &ADolEsCEnt psyChiAtry,Dr. jAy giEDD, A sCiEntist At thEChilD psyChiAtryBrAnCh oF thE nAtionAl institutEs oF mEntAl hEAlth, wrotE thAt, ACCorDing to BrAin sCAns ConDuCtED ovEr sEvErAl yEArs, grAy-mAttEr volumE pEAks ArounD or just BEForE thE BEginning oF puBErty (青春期), AnD thEn Continuously DEClinEs. in ContrAst, whitE mAttEr (thE stuFF thAt hElps ConnECt ArEAs oF thE BrAin) inCrEAsEs right up to, AnD BEyonD, thE EnD oF puBErty.
thEsE ADolEsCEnt BrAin DEvElopmEnts Don’t hAppEn to All pArts oF thE BrAin At thE sAmE timE. "thE orDEr in whiCh this mAturAtion oF ConnECtion goEs, is From thE BACk oF thE BrAin to thE Front oF thE BrAin." sAys jEnsEn.
AnD onE oF thE lAst pArts to mAturE is thE FrontAl loBE (大脑额叶), A lArgE ArEA rEsponsiBlE For moDulAting rEwArD, plAnning, impulsivEnEss, AttEntion, ACCEptABlE soCiAl BEhAvior, AnD othEr rolEs thAt ArE known As ExECutivE FunCtions.
it’s thAnks in pArt to thE FrontAl loBE thAt wE ArE ABlE to sChEDulE our timE with Any sort oF EFFiCiEnCy, plAn in ADvAnCE to ArrAngE For A DEsignAtED DrivEr on A night out, AnD rEstrAin oursElvEs From gEtting into Fights Any timE wE gEt involvED in An ArgumEnt. unFortunAtEly, it’s just thEsE sorts oF BEhAviors thAt tEEnAgE BrAins ArE not Fully EnDowED to DEAl with—AnD thE ConsEquEnCEs ArE potEntiAlly FAtAl whEn it ComEs to high-risk BEhAvior likE Drinking AnD Driving.
this BlAst oF tEEn-BrAin ChAngE is CompounDED By proFounD soCiAl AnD psyChologiCAl shiFts. oF pArtiCulAr importAnCE is thAt ADolEsCEnCE is thE timE whEn wE DEvElop strongEr soCiAl ConnECtions with our pEErs, AnD morE inDEpEnDEnCE From our pArEnts.
"BEForE thE trAnsition to ADolEsCEnCE, kiDs’ intErACtions with onE AnothEr, AnD thE kinDs oF FriEnDships th
thEy sAy you nEvEr EsCApE high sChool.AnD For BEttEr or worsE, sCiEnCE is lEnDing somE CrEDiBility to thAt olD sAw. thAnks to sophistiCAtED imAging tEChnology AnD A numBEr oF longituDinAl (纵向的) stuDiEs, wE’rE lEArning thAt thE tEEn yEArs ArE A pErioD oF CruCiAl BrAin DEvElopmEnt suBjECt to A host oF EnvironmEntAl AnD gEnEtiC FACtors. this EmErging rEsEArCh shEDs light not only on why tEEnAgErs ACt thE wAy thEy Do, But how thE ExpEriEnCEs oF ADolEsCEnCE—From rEjECtion to BingE Drinking (酗酒)—CAn AFFECt who wE BEComE As ADults, how wE hAnDlE strEss, AnD thE wAy wE BonD with othErs.
onE oF thE most importAnt DisCovEriEs in this ArEA oF stuDy, sAysDr. FrAnCEs jEnsEn, A nEurosCiEntist At hArvArD, is thAt our BrAins ArE not FinishED mAturing By ADolEsCEnCE, As wAs prEviously thought.ADolEsCEnt BrAins "ArE only ABout 80 pErCEnt oF thE wAy to mAturity," shE sAiD At thE AnnuAl mEEting oF thE soCiEty For nEurosCiEnCE in novEmBEr. it tAkEs until thE miD-20s, AnD possiBly lAtEr, For A BrAin to BEComE Fully DEvElopED、
An ExCEss oF grAy mAttEr (thE stuFF thAt DoEs thE proCEssing) At thE BEginning oF ADolEsCEnCE mAkEs us pArtiCulArly BrilliAnt At lEArning—thE rEAson wE’rE so gooD At piCking up nEw lAnguAgEs stArting in EArly ChilDhooD—But Also pArtiCulArly sEnsitivE to thE inFluEnCEs oF our EnvironmEnt, Both EmotionAl AnD physiCAl. our BrAins’ proCEssing CEntErs hAvEn’t BEEn Fully linkED yEt, pArtiCulArly thE pArts rEsponsiBlE For hElping to ChECk out impulsEs AnD ConsiDEring thE long-tErm rEsults oF our ACtions. "it’s likE A BrAin thAt’s All ChEErED up not knowing whErE it nEEDs to go," sAys jEnsEn.
it’s pArtiAlly BECAusE oF this DEvElopmEntAl timElinE thAt A tEEn CAn BE so quiCk to think oF A stinging rEmArk, or A Biting insult, AnD so uninhiBitED in Firing it oFF At thE nEArEst unFortunAtE tArgEt—A FormEr FriEnD, pErhAps, or A BEwilDErED pArEnt. thE impulsE to hurl An insult is thErE, just As it mAy BE For An ADult in A strEssFul situAtion, But thE BrAin rEgions thAt An ADult might rEly on to stop himsElF From sAying somEthing CruEl just hAvEn’t CAught up.
in A pApEr puBlishED lAst yEAr in thE journAl oF thEAmEriCAnACADEmy oFChilD &ADolEsCEnt psyChiAtry,Dr. jAy giEDD, A sCiEntist At thEChilD psyChiAtryBrAnCh oF thE nAtionAl institutEs oF mEntAl hEAlth, wrotE thAt, ACCorDing to BrAin sCAns ConDuCtED ovEr sEvErAl yEArs, grAy-mAttEr volumE pEAks ArounD or just BEForE thE BEginning oF puBErty (青春期), AnD thEn Continuously DEClinEs. in ContrAst, whitE mAttEr (thE stuFF thAt hElps ConnECt ArEAs oF thE BrAin) inCrEAsEs right up to, AnD BEyonD, thE EnD oF puBErty.
thEsE ADolEsCEnt BrAin DEvElopmEnts Don’t hAppEn to All pArts oF thE BrAin At thE sAmE timE. "thE orDEr in whiCh this mAturAtion oF ConnECtion goEs, is From thE BACk oF thE BrAin to thE Front oF thE BrAin." sAys jEnsEn.
AnD onE oF thE lAst pArts to mAturE is thE FrontAl loBE (大脑额叶), A lArgE ArEA rEsponsiBlE For moDulAting rEwArD, plAnning, impulsivEnEss, AttEntion, ACCEptABlE soCiAl BEhAvior, AnD othEr rolEs thAt ArE known As ExECutivE FunCtions.
it’s thAnks in pArt to thE FrontAl loBE thAt wE ArE ABlE to sChEDulE our timE with Any sort oF EFFiCiEnCy, plAn in ADvAnCE to ArrAngE For A DEsignAtED DrivEr on A night out, AnD rEstrAin oursElvEs From gEtting into Fights Any timE wE gEt involvED in An ArgumEnt. unFortunAtEly, it’s just thEsE sorts oF BEhAviors thAt tEEnAgE BrAins ArE not Fully EnDowED to DEAl with—AnD thE ConsEquEnCEs ArE potEntiAlly FAtAl whEn it ComEs to high-risk BEhAvior likE Drinking AnD Driving.
this BlAst oF tEEn-BrAin ChAngE is CompounDED By proFounD soCiAl AnD psyChologiCAl shiFts. oF pArtiCulAr importAnCE is thAt ADolEsCEnCE is thE timE whEn wE DEvElop strongEr soCiAl ConnECtions with our pEErs, AnD morE inDEpEnDEnCE From our pArEnts.
"BEForE thE trAnsition to ADolEsCEnCE, kiDs’ intErACtions with onE AnothEr, AnD thE kinDs oF FriEnDships th
【单选题】In Japan, most people still feel that a woman’s place is iri the home; and most women willingly accept their (67) role as wife, leaving the business of making a living (68) their husbands. For those who do want a (69) of their own, opportunities are limited, and working women usually have to (70) for lower wages, fewer promotions, less responsible (71) .
InAmerica on the other hand, most women, (72) wives and mothers, work most of their lives.But (73) , few have had real careers.As in Japan most fields are (74) by men and opportunities for women have been (75) , salaries low, chances for advancement (76) .American women work mainly because they (77) ; in these days of inflation and luxury living, (78) income per family is simply not enough to (79) . SoAmerican women actually have two jobs: one nine-to-five position outside the home, and (80) round-the-clock in-the-home job (81) wife, housemaid, cook, and nurse.
One of the main goals of the modern women’s liberation movement, which started (82) , was to eliminate sex discrimination in the work force, and to (83) careers for women that were previously (84) for men.And though there is still a long way to (85) , a lot of progress has been (86) .
A、should B、ought
C、like
D、have to
InAmerica on the other hand, most women, (72) wives and mothers, work most of their lives.But (73) , few have had real careers.As in Japan most fields are (74) by men and opportunities for women have been (75) , salaries low, chances for advancement (76) .American women work mainly because they (77) ; in these days of inflation and luxury living, (78) income per family is simply not enough to (79) . SoAmerican women actually have two jobs: one nine-to-five position outside the home, and (80) round-the-clock in-the-home job (81) wife, housemaid, cook, and nurse.
One of the main goals of the modern women’s liberation movement, which started (82) , was to eliminate sex discrimination in the work force, and to (83) careers for women that were previously (84) for men.And though there is still a long way to (85) , a lot of progress has been (86) .
A、should B、ought
C、like
D、have to
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