首页
登录
职称英语
Why have the Americans developed space shuttle according to the passage? [br] [
Why have the Americans developed space shuttle according to the passage? [br] [
游客
2025-01-17
18
管理
问题
Why have the Americans developed space shuttle according to the passage? [br]
Ever since the Apollo moon landings, the idea of human expeditions to the Mars has come up repeatedly as the kind of grand adventures that would give focus, purpose, and inspirational lift to the space program. But confronted with the cost — estimated at $ 150 billion last week — presidents starting with Richard Nixon and others have flinched and resorted to halfway measures like the shuttle.
Stem cells are undeveloped human cells that can grow into many or all of the different specialized cells in the human body. Although stem cells have been harvested from adults, the most versatile stem cells come from embryos. The main source of embryos is fertility clinics. Vitro fertilization, the process that produces test-tube babies, involves the fertilization of eggs to produce embryos outside the woman’s body.
选项
A、It discusses fertility clinics.
B、It defines stem cells.
C、It mentions artificial fertilization.
D、It identifies the origins of stem cells.
答案
A
解析
语义逻辑关系的识别。本题要求识别原文的逻辑结构。原文主要讨论的是stem cells(干细胞),如干细胞的定义、起源等,fertility clinics(人工受精)虽有提及,但不属于主要讨论的话题。因此选项A的说法符合题义,是正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3916894.html
相关试题推荐
Accordingtothelawofthatcountry,theParliamentwillhavetobe________befo
Accordingtoanthropologists,peopleinpre-industrialsocietiesspent3to
Accordingtoanthropologists,peopleinpre-industrialsocietiesspent3to
Accordingtoanthropologists,peopleinpre-industrialsocietiesspent3to
Accordingtoanthropologists,peopleinpre-industrialsocietiesspent3to
Accordingtoanthropologists,peopleinpre-industrialsocietiesspent3to
Accordingtoevolutionarypsychology,wehadtobeevolvedtobenicetoeachot
Americans,increasinglyconsumedbyfearswhatChinaposesacommercialandmili
LadiesandGentlemen,RecentpollsshowthatthemajorityofAmericans
HIV/AIDSisnowrecognizedclearlyasagrowingthreattoChina.Accordingt
随机试题
WhichfigurerepresentsLifestyleFoods’marl[br]AccordingtotheProductionM
我担心他会把我拽下去,这使我高度紧张。Itwasnerve-rackingbecauseIwasworriedhewasgoingtopu
Aramblingframebuildingdatingbackto1710,theRobertMorrisInnstands
Therewasatimeinmylifewhenpeopleasked【C1】______forstoriesaboutwha
A.经济效益 B.治疗技术 C.医疗设备 D.医德医风 E.规章制度提高
(2016年真题)()通过依法行使审批或核准权,依法办理基金备案,对基金管
Thechangeinthatvillagewasmiraculou
2020年,全国软件和信息技术服务业(即软件业)企业超4万家,累计完成软件业务收
( )是施工合同的基础和框架。A.核心条款 B.主要选项条款 C.
下列项目目标控制工作中,属于主动控制的是()。A.事前分析可能导致目标偏离的各种
最新回复
(
0
)