职称英语卫生B类试题补全短文模拟练习2018年职称英语卫生B类试题补全短文模拟练习Keepongoingnevergiveup以下是小编为大家搜索整理的2018年职称英语卫生B类试题补全短文模拟练习，希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!VitaminsVitaminsareorganiccompoundswhicharepresentincertainfoodsandareessentialtothehealthofmenandotheranimals.__1__.Withoutthesesubstances,thebreakdownandabsorptionoffoodscouldnotoccur.Certainvitaminsparticipateintheformationofbloodcells,hormones,nervoussystemchemicals,andgeneticmaterials.__2__.Fat-solublevitaminsincludevitaminsA,D,EandK.Thewater-solublevitaminsincludevitaminCandtheB-vitamincomplex.Fat-solublevitaminsareusuallyabsorbedwithfoodsthatcontainfat.Excessiveamountsofthesevitaminsarestoredinthebody'sfat,theliverandkidneys.Becausefat-solublevitaminscanbestored,theydonothavetobeconsumedeveryday.__3__.AdeficiencyofvitaminAleadstoskinchangesandnightblindness,orfailureoftheeyetoadapttothedark.VitaminAcanbeobtaineddirectlyfromfoodsofanimaloriginsuchasmilk,eggs,andliver.__4__.VitaminDactsmucklikeahormoneandregulatescalciumandphosphorusabsorptionandmetabolism.SomevitaminDisobtainedfromsuchfoodsaseggs,fish,liver,butter,andmilk.ButhumansgetmostoftheirvitaminDfromexposureoftheskintosunlight.AdeficiencyofvitaminDleadstoboneproblems.TheroleofvitaminEinthehumanbodyhasnotbeenestablished.——__5__VitaminEisfoundinseedoilandwheat.VitaminKisnecessaryfortheclottingofblood.Itisproducedinsufficientquantitiesbybacteriaintheintestine,butisalsoprovidedbyleafygreenvegetablesandeggs.Thewater-solublevitamins,CandBcomplex,cannotbestoredandthereforeneedtobeconsumeddailytosatisfythebody'sneeds.VitaminCisimportantintheformationandmaintenanceofconnectivetissue.Itprotectsgums,skin,andmucousmembranes.Itismainlyfoundinfruitslikeoranges.B-complexvitaminsserveawiderangeofimportantmetabolicfunctionsandpreventsomediseases.Theyarefoundmostlyintheliver.A.Vitaminsareclassifiedintotwogroups,thatis,thefat-soluble(溶解脂肪的)andthewater-soluble(溶解水的)vitamins.B.Theirfunctionsaremainlytoenhancethemetabolism(新陈代谢)ofproteinsandfats.C.Itisnecessaryforahealthylife.D.Vitami