【单选题】iF it is lEFt ______, this FAst-sprEADing DisEAsE is likEly to AFFECt millions oFAsiAn AnDAFriCAn ChilDrEn, inCluDing morE AnD morE injurED grown-ups.
A、unChECkEDB、unControllED
C、trAnsmittED
D、ContAminAtED
A、unChECkEDB、unControllED
C、trAnsmittED
D、ContAminAtED
【单选题】Although he refused to act on my suggestion, he had to admit that ____ what I said.
A．it was something in
B．there was something as
C．it was something as
D．there was something in
A．it was something in
B．there was something as
C．it was something as
D．there was something in
【单选题】You’ve probably heard the reports that moderate drinking can actually be good for your heart.But before you stock up (囤积) on beer, wine, or liquor for "medicinal purposes", read the fine print.
Guidelines published by theDepartment of Health and Human Services define moderate drinking as no more than a drink a day for most women and no more than two drinks a day for most men.But even moderate drinking may be ill-advised as you get older.
Research shows that as you age, you absorb alcohol more readily and are more sensitive to its effects. So the number of drinks you could tolerate years ago may be too much for you now. Why First, your body’s ratio of water to fat falls as you age, so there’s less water to dilute (稀释) the alcohol. Second, you have less blood flow to the liver and less efficient liver enzyme action, so your body doesn’t metabolize (新陈代谢) alcohol as readily.
Women need to be especially careful, since most can’t tolerate as much alcohol as men can. One reason is that they are generally smaller, and smaller people have less blood volume, so a little alcohol goes a longer way. Women also produce less of the enzyme that breaks down alcohol in the stomach before it is absorbed into the bloodstream.And they have a higher proportion of body fat, which does not absorb alcohol. The resultDrink for drink, women have 750//00 more alcohol in their bloodstream than men do.
Despite the caveats (警告, 告诫), there’s no doubt that, for many people, limited amounts of alcohol can help you live longer and decrease your risk of heart disease. Those who may be at risk for heart disease or stroke and those who are diabetic appear to benefit most from moderate alcohol intake (one or two drinks per day) over the course of their lifetimes.
For example, in a University of Wisconsin study of diabetic men and women with an average age of 69, the risk of death from coronary heart disease was significantly lower among moderate drinkers compared to abstainers (戒酒者). The death rate for those who had a drink a day was less than half of that for those who didn’t drink at all.
As you get older, ______.
A、you can tolerate more alcohol
B、you have less water in your body
C、your body metabolize alcohol more readily
D、your body becomes more sensitive to alcoholic effects
Guidelines published by theDepartment of Health and Human Services define moderate drinking as no more than a drink a day for most women and no more than two drinks a day for most men.But even moderate drinking may be ill-advised as you get older.
Research shows that as you age, you absorb alcohol more readily and are more sensitive to its effects. So the number of drinks you could tolerate years ago may be too much for you now. Why First, your body’s ratio of water to fat falls as you age, so there’s less water to dilute (稀释) the alcohol. Second, you have less blood flow to the liver and less efficient liver enzyme action, so your body doesn’t metabolize (新陈代谢) alcohol as readily.
Women need to be especially careful, since most can’t tolerate as much alcohol as men can. One reason is that they are generally smaller, and smaller people have less blood volume, so a little alcohol goes a longer way. Women also produce less of the enzyme that breaks down alcohol in the stomach before it is absorbed into the bloodstream.And they have a higher proportion of body fat, which does not absorb alcohol. The resultDrink for drink, women have 750//00 more alcohol in their bloodstream than men do.
Despite the caveats (警告, 告诫), there’s no doubt that, for many people, limited amounts of alcohol can help you live longer and decrease your risk of heart disease. Those who may be at risk for heart disease or stroke and those who are diabetic appear to benefit most from moderate alcohol intake (one or two drinks per day) over the course of their lifetimes.
For example, in a University of Wisconsin study of diabetic men and women with an average age of 69, the risk of death from coronary heart disease was significantly lower among moderate drinkers compared to abstainers (戒酒者). The death rate for those who had a drink a day was less than half of that for those who didn’t drink at all.
As you get older, ______.
A、you can tolerate more alcohol
B、you have less water in your body
C、your body metabolize alcohol more readily
D、your body becomes more sensitive to alcoholic effects
【单选题】thE iDEA oF tEst-tuBE BABiEs mAy mAkE you EithEr DElightED At thE wonDErs oF moDErn mEDiCinE or irritAtED whilE ConsiDEring thE morAl, or lEgAl, or tEChnologiCAl impliCAtions oF stArting liFE in A lABorAtory.But iF you’vE EvEr BEEn prEgnAnt yoursElF, onE thing is CErtAin: you wonDEr whAt it’s likE to CArry A tEst-tuBE BABy.ArE thEsE prEgnAnCiEs normAlArE thE BABiEs normAl
thE EArliEst AnswErs ComE FromAustrAliA, whErE A group oF mEDiCAl ExpErts At thE quEEn viCtoriA mEDiCAlCEntEr in mElBournE hAvE tAkEn A look At thE ContinEnt’s First ninE suCCEssFul "in vitro" prEgnAnCiEs. thEAustrAliAns rEport thAt thE prEgnAnCiEs thEmsElvEs sEEmED to proCEED ACCorDing to plAn, But At Birth somE unusuAl trEnDs DiD show up. sEvEn oF thE ninE BABiEs turnED out to BE girls. six oF thE ninE wErE DElivErED ByCAEsArEAn sECtion (剖腹产手术).AnD onE BABy, A twin, wAs Born with A sErious hEArt DEFECt AnD A FEw DAys lAtEr DEvElopED liFE-thrEAtEning proBlEms.
whAt DoEs it All mEAnEvEn thE DoCtors Don’t know For surE, BECAusE thE numBErs ArE so smAll. thE proportion oF girls to Boys is high, But until thErE ArE mAny morE tEst-tuBE BABiEs no onE will know whEthEr thAt’s somEthing thAt just hAppEnED to BE likE thAt or somEthing spECiAl thAt hAppEns whEn Egg mEEts spErm in A tEst tuBE instEAD oF A FAllopiAn tuBE (输卵管). thE sAmE thing is truE oF thE singlE hEArt DEFECt; it usuAlly shows up in only 15 out oF 60,000 Births in thAt pArt oFAustrAliA, But thE FACt thAt it oCCurrED in onE out oF ninE tEst-tuBE BABiEs DoEs not nECEssArily mEAn thAt thEy ArE At spECiAl risk. onE thing thE DoCtors CAn ExplAin is thE high numBEr oFCAEsArEAns. most oF thE mothErs wErE olDEr, hAD long historiEs oF FErtility proBlEms AnD in somE CAsEs hAD hAD surgEry on thE FAllopiAn tuBEs, All oF whiCh mADE thEm likEly CAnDiDAtEs ForCAEsArEAns AnywAy.
thEAustrAliAn rEsEArChErs rEport thAt thEy ArE quitE EnCourAgED、All thE BABiEs ArE now mAking normAl progrEss, EvEn thE twin with thE Birth DEFECts.
whAt is thE Author’s AttituDE towArD thE iDEA oF tEst-tuBE BABiEs
A、optimistiC、 B、pEssimistiC、
C、DElightED、 D、irritAtED、
thE EArliEst AnswErs ComE FromAustrAliA, whErE A group oF mEDiCAl ExpErts At thE quEEn viCtoriA mEDiCAlCEntEr in mElBournE hAvE tAkEn A look At thE ContinEnt’s First ninE suCCEssFul "in vitro" prEgnAnCiEs. thEAustrAliAns rEport thAt thE prEgnAnCiEs thEmsElvEs sEEmED to proCEED ACCorDing to plAn, But At Birth somE unusuAl trEnDs DiD show up. sEvEn oF thE ninE BABiEs turnED out to BE girls. six oF thE ninE wErE DElivErED ByCAEsArEAn sECtion (剖腹产手术).AnD onE BABy, A twin, wAs Born with A sErious hEArt DEFECt AnD A FEw DAys lAtEr DEvElopED liFE-thrEAtEning proBlEms.
whAt DoEs it All mEAnEvEn thE DoCtors Don’t know For surE, BECAusE thE numBErs ArE so smAll. thE proportion oF girls to Boys is high, But until thErE ArE mAny morE tEst-tuBE BABiEs no onE will know whEthEr thAt’s somEthing thAt just hAppEnED to BE likE thAt or somEthing spECiAl thAt hAppEns whEn Egg mEEts spErm in A tEst tuBE instEAD oF A FAllopiAn tuBE (输卵管). thE sAmE thing is truE oF thE singlE hEArt DEFECt; it usuAlly shows up in only 15 out oF 60,000 Births in thAt pArt oFAustrAliA, But thE FACt thAt it oCCurrED in onE out oF ninE tEst-tuBE BABiEs DoEs not nECEssArily mEAn thAt thEy ArE At spECiAl risk. onE thing thE DoCtors CAn ExplAin is thE high numBEr oFCAEsArEAns. most oF thE mothErs wErE olDEr, hAD long historiEs oF FErtility proBlEms AnD in somE CAsEs hAD hAD surgEry on thE FAllopiAn tuBEs, All oF whiCh mADE thEm likEly CAnDiDAtEs ForCAEsArEAns AnywAy.
thEAustrAliAn rEsEArChErs rEport thAt thEy ArE quitE EnCourAgED、All thE BABiEs ArE now mAking normAl progrEss, EvEn thE twin with thE Birth DEFECts.
whAt is thE Author’s AttituDE towArD thE iDEA oF tEst-tuBE BABiEs
A、optimistiC、 B、pEssimistiC、
C、DElightED、 D、irritAtED、
【单选题】Electronic computers ______, the complicated mathematical operations, such as weather forecast and the control of satellites, can be done quickly and accurately.
A、being used
B、used
C、having been used
D、to be used
A、being used
B、used
C、having been used
D、to be used
发布评论 查看全部评论