首页
登录
职称英语
One of medicine’s fundamental beliefs about pregnancy and the development o
One of medicine’s fundamental beliefs about pregnancy and the development o
游客
2023-11-22
64
管理
问题
One of medicine’s fundamental beliefs about pregnancy and the development of the human fetus has been challenged. Until recently, it was thought that the fetus was a parasite capable of extracting all the nutrients it needed from the mother. It is now realized that adequate nutrition during the entire course of the pregnancy is necessary for proper fetal development.
In early pregnancy, certain changes occur in the mother’s gastrointestinal tract, resulting in more efficient absorption of specific nutrients, such as iron and calcium. Furthermore, the maternal blood supply increases, so that nutrients can be transported via the uterine and placental blood systems: If the mother is undernourished, this "lifeline" to the fetus will be inadequately developed. Finally, fat is accumulated within the body to store the energy necessary for lactation (milk production), This preparation for lactation is so important that if the mother is inadequately nourished, it will take place even at the expense of fetal growth. It is a logical developmental occurrence, since in the natural world, no infant can survive without successful breastfeeding, and thus fetal growth is less of a priority. [br] The passage mainly discusses______
选项
A、how the human fetus develops
B、the benefits of breastfeeding
C、methods of achieving proper maternal nutrition
D、the effect of maternal nutrition on the fetus
答案
D
解析
本题询问全文的中心。文章第一段的最后一句就点明了全文的中心,即,怀孕过程中适足的营养对胎儿的正常发育很重要。接下来的文字通过几个不同的时期母亲体内营养状况的变化来说明母亲的营养状况对胎儿的影响。因此,四个选项中只有D击中要害。
转载请注明原文地址:https://tihaiku.com/zcyy/3208677.html
相关试题推荐
Accordingtothespeaker,whatwerethebeliefsoftheGreekphilosophersbased
Accordingtothespeaker,whatwerethebeliefsoftheGreekphilosophersbased
Whatdevelopmentcausedadeclineintheuseofrailroads?[br][originaltext]
Theeffectofthemedicine,________wehadexpected,wasquiteencouraging.A、wh
Thereweretwowidelydivergentinfluencesontheearlydevelopmentofstat
Thereweretwowidelydivergentinfluencesontheearlydevelopmentofstat
Thereweretwowidelydivergentinfluencesontheearlydevelopmentofstat
Thefirsttwostagesinthedevelopmentofcivilizedmanwereprobablytheinven
Oneofmedicine’sfundamentalbeliefsaboutpregnancyandthedevelopmento
Oneofmedicine’sfundamentalbeliefsaboutpregnancyandthedevelopmento
随机试题
Kidswithspecialneedsrefertoanykidwhomightneedextrahelpbecauseo
______isamasterpieceoftranscendentalismwrittenbyHenryDavidThoreau.A、Tal
Ifeveryouarecalled【C1】______tointroduceaspeaker;itwouldbewellfor
对策者包括昆虫、细菌、杂草及一年生短命植物等。
消防水池是人工建造的供固定或移动消防水泵吸水的储水设施,是建筑消防中十分重要的水
根据《建设工程施工合同(示范文本)》(GF-2017-0201),除专用合同条款
弥漫型系统性硬化病的标记抗体是()A.抗Scl-70抗体 B.抗Sm抗体
以下细菌中,对呋喃妥因耐药的是()A.产气肠杆菌 B.铜绿假单胞菌 C
下列民事责任中,归责时适用无过错责任原则的是()。A.小李在工作中罹患职业病
工作流程组织包括管理工作流程组织、信息处理工作流程组织和物质流程组织。设计工作流
最新回复
(
0
)