首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
One of medicine’s fundamental beliefs about pregnancy and the development of the human fetus has been challenged. Until recently
One of medicine’s fundamental beliefs about pregnancy and the development of the human fetus has been challenged. Until recently
admin
2010-01-15
84
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.
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://kaotiyun.com/show/V46K777K
0
专业英语四级
相关试题推荐
TheNationalTourismAdministrationhasrecentlyissuedadocumenttosupportthelegalizationoftipsinthetourismindustryi
TherecentlyincreasingnumberofcommercialactivitiesinmuseumshascausedwidespreadconcerninChina.Peopleworrythatthi
A、Takinganoperation.B、Injectiontherapy.C、Blooddonation.D、Takingmedicine.C对话中在主持人说过铁元素过多的治疗方式有些原始后,Sharon说,确实很神奇,只是简单的捐献
Withtheincreasingdemandsofnewmedicines,animaltestingisinwidespreaduseallovertheworld.Themoralitybehindthis
PASSAGETHREEIn"Itwasasevereset-backtoherrecentlypleasedmentalstate."(Para.16),whatdoes"herrecentlypleasedm
A、Itcanbeeffectivewithinaveryshortperiodoftime.B、ItcomplementstheweaknessesofWesternmedicine.C、Itseffectcan
A、Herbalmedicine.B、Acupuncture.C、Massage.D、Injection.D细节题。需要用排除法解答。当问及中医的组成部分时,王教授回答道:Itconsistsofthreemainmodalities:
随机试题
社会工作者小王正在设计邻里互动小组中的最后一节活动“邻里茶话会”。她的活动设计方案中包括茶话会的目标、参与者信息、活动流程、时间安排、组员角色、场地布置、活动成效评估方法、预计困难及应对措施。项目主任提醒她在方案中还应该包括()。
氯霉素的抗菌谱包括()。
下列哪项系统必须借助于三维GIS实现()
中央银行在决定货币政策时,不仅要考虑通货膨胀、充分就业和经济增长,而且还要考虑到国际收支平衡,而经济增长是中央银行外汇管理的主要目标。( )
某社会团体与某私立学校共同出资设立一合伙企业,经营文具用品。两年后,因经营亏损,该合伙企业财产不足以清偿全部债务。下列关于各合伙人承担责任的表述中,符合《合伙企业法》规定的有()。
决策者对未来会出现的自然状态不能完全把握,但这些自然状态出现的概率是可以知道的。这种条件下的决策属于()。
孔子提出的“不愤不启,不悱不发”是要求在教学法中贯彻_______。
TheimpactofThoreau’sOntheDutyofCivilDisobediencemightnothavebeensofarreaching______forElizabethPeabody,who
AIDSiscausinggreatpublicconcernbecausethe______fataldiseasehitsprimarilyyoungpeople.
—"IsRandysick?"—"Yes,______allnightintheraincausedhimtocatchacold."
最新回复
(
0
)