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
2023-12-24
45
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/3302334.html
相关试题推荐
ButitturnsoutAmericansarenowblowingevenmoremoneythaneverbeforeonw
MaoridevelopedtraditionalchantsandsongsfromtheirancientSoutheastAsian
ThefactthatmostAmericansliveinurbanareasdoesnotmeanthattheyres
ThefactthatmostAmericansliveinurbanareasdoesnotmeanthattheyres
ThefactthatmostAmericansliveinurbanareasdoesnotmeanthattheyres
ThefactthatmostAmericansliveinurbanareasdoesnotmeanthattheyres
ThefactthatmostAmericansliveinurbanareasdoesnotmeanthattheyres
ThefactthatmostAmericansliveinurbanareasdoesnotmeanthattheyres
Americanswhoconsiderthemselves______inthetraditionalsensedonotusually
One’sknowledgeoftheworld,accordingtohumanists,islargelyderivedbyobse
随机试题
[originaltext]ResearchershavefoundnotjustadiversityprobleminHollywo
Whodoesn’tlovebeinginlove?Atruelovelistenstoyoutalkaboutwork,
垃圾填埋场的使用期限较长,达()年以上。A.5 B.7 C.10 D.1
A.牙尖交错位(IGP) B.位 C.下颌后退接触位(RCP) D.颌位
C
下列房地产投资方式中,属于直接投资形式的是( )。A.购买房地产股票 B.购
我国相关规定中,历史文化街区和历史建筑的保护界线称为()。A.城市蓝线 B
“月落乌啼霜满天,江枫渔火对愁眠。姑苏城外寒山寺,夜半钟声到客船。”这首诗歌中的
波浪理论考虑的因素主要有()。A:股价走势所形成的形态 B:股价走势图中各个高
在明挖基坑地基加固处理中,基坑内加固的目的主要有( )。A.提高土体的强度和土体
最新回复
(
0
)