Life Span About a century ago, the average life span for Americans was about 50 years. /Today, the typical American lives fo

admin2016-05-30 55

问题

选项

答案 Life Span About a century ago, the average life span for Americans was about 50 years. /Today, the typical American lives for around seventy-eight years. / What accounts for such increased longevity? /Between 1900 and 1950, inventions such as refrigeration and sewage treatment meant that/young people were able to survive longer. /Moreover, medical breakthroughs helped contain diseases/such as some fatal ones that killed many children. /These advances helped increase the average life span. /This means that future medical breakthroughs will result in even longer average life span.

解析

转载请注明原文地址:https://kaotiyun.com/show/eGPK777K

专业英语四级

相关试题推荐

Asimplecomputerprogramthatteacheschildrentodistinguishbetweensoundscandramatically【C1】______theirlisteningskills.
UniversitystudentsarebusypreparingforexamstogetallkindsofcertificatesforEnglishproficiency,computerskills,acco
Therehavealwaysbeenreputableandcompetentscientistswhohavedisagreedwithnewtheories.Theunderlinedpartmeans______.
Priorityshouldbegiventopeople’slivelihoodandtheirtangiblebenefits.Theunderlinedpartmeans______.
Afacialexpressionresultsfromoneormoremotionsorpositionsofthemusclesoftheface.Thesemovements【C1】______theemot
Controloftheseemissionsbyadequategas-cleaningprocessingisessential.Theunderlinedpartmeans______.
WhichofthefollowingisNOTthecharacteristicofhigh-incomechildren?
HewasoneofNewcastle’smost______medicalmen,aworldauthorityonheartdiseases.
SomeofmyfondestmemoriesarewhenI’veputtogetheralargegroupoffriendsanddidnothingbut______.
A、Topretendtobeonabusduringaflight.B、Totakeaseatnexttoanemergencyexit.C、Tositatamorestableplaceonapl

随机试题

白喉棒状杆菌在形态上主要特征是()
患者，男性，35岁。1天前饮酒后出现上腹剧烈疼痛，伴恶心、呕吐及腹胀，大小便正常。查体：上腹偏左腹肌紧张，明显压痛，腹平片膈下未见游离气体。治疗过程中，提示病情尚未加重的是()
下列属于构成人体蛋白质的氨基酸中的非必需氨基酸的是()
应贮存于棕色容器内的药是
应采取措施保证监测数据的准确性、连续性和完整性，确保全面、客观地反映监测结果。所有有效数据均应()，不得选择性地舍弃不利数据以及人为干预监测和评价结果。
应当建立备查账核算的是()。
事业单位的下列基金中，按规定从结余中提取的是()。
简述培养集体的方法。
面向对象中的(47)机制是对现实世界中遗传现象的模拟，通过该机制，基类的属性和方法被遗传给派生类。
Corporatecultureisanotanewterm.Ithasbeenusedtodescribethe【C1】______beliefs,valuesystems,andprocessesthatprov

最新回复(0)

Life Span About a century ago, the average life span for Americans was about 50 years. /Today, the typical American lives fo

专业英语四级

Asimplecomputerprogramthatteacheschildrentodistinguishbetweensoundscandramatically【C1】______theirlisteningskills.

UniversitystudentsarebusypreparingforexamstogetallkindsofcertificatesforEnglishproficiency,computerskills,acco

Therehavealwaysbeenreputableandcompetentscientistswhohavedisagreedwithnewtheories.Theunderlinedpartmeans______.

Priorityshouldbegiventopeople’slivelihoodandtheirtangiblebenefits.Theunderlinedpartmeans______.

Afacialexpressionresultsfromoneormoremotionsorpositionsofthemusclesoftheface.Thesemovements【C1】______theemot

Controloftheseemissionsbyadequategas-cleaningprocessingisessential.Theunderlinedpartmeans______.

WhichofthefollowingisNOTthecharacteristicofhigh-incomechildren?

HewasoneofNewcastle’smost______medicalmen,aworldauthorityonheartdiseases.

SomeofmyfondestmemoriesarewhenI’veputtogetheralargegroupoffriendsanddidnothingbut______.

A、Topretendtobeonabusduringaflight.B、Totakeaseatnexttoanemergencyexit.C、Tositatamorestableplaceonapl

白喉棒状杆菌在形态上主要特征是()

患者，男性，35岁。1天前饮酒后出现上腹剧烈疼痛，伴恶心、呕吐及腹胀，大小便正常。查体：上腹偏左腹肌紧张，明显压痛，腹平片膈下未见游离气体。治疗过程中，提示病情尚未加重的是()

下列属于构成人体蛋白质的氨基酸中的非必需氨基酸的是()

应贮存于棕色容器内的药是

应采取措施保证监测数据的准确性、连续性和完整性，确保全面、客观地反映监测结果。所有有效数据均应()，不得选择性地舍弃不利数据以及人为干预监测和评价结果。

应当建立备查账核算的是()。

事业单位的下列基金中，按规定从结余中提取的是()。

简述培养集体的方法。

面向对象中的(47)机制是对现实世界中遗传现象的模拟，通过该机制，基类的属性和方法被遗传给派生类。

Corporatecultureisanotanewterm.Ithasbeenusedtodescribethe【C1】______beliefs,valuesystems,andprocessesthatprov