How has science done a disservice to mankind? What are nitrates used for?

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问题 How has science done a disservice to mankind?
What are nitrates used for?

选项 A、They preserve flavor in packaged foods.
B、They preserve the color of meats.
C、They are the objects of research.
D、They cause the animals to become fatter.

答案B

解析

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英语

成考专升本

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How has science done a disservice to mankind? What are nitrates used for?

英语

成考专升本

Somepeoplewillbeatalosswhattodo(incaseofafire).

Mostpeople______.New-bornbabies______.

ThebabywassenttoahospitalinLondonbecause______.Fromthispassageitseemsthatthebaby’sillnesshadsomethingtod

Vegetablegardeningistherelaxingartandscienceofturningaloveforgrowingplantsintoameaningfulactivity.Havingvege

Itwasanegg______mymotherthrewattheMinisterofEducationyesterday.

Itisimportantforeveryone______learnEnglish.

Thefoodweeatseemstohaveprofoundeffectsonourhealth.Althoughsciencehasmadeenormousstepsinmakingfoodmorefitt

HisrecommendationthattheAirForce______(investigate)theUFOsightingwasapprovedbythecommittee.

I______myformerschoolteacherwhenIwasshoppingyesterday.

Mary’sprofessorhadher______papermanytimesbeforeallowinghertopresentittothecommittee.

二氧化碳在使用时应注意哪些事项?

血液中CO2浓度对呼吸的调节主要是通过

佝偻病常见的胸部改变是（）

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