首页
登录
职称英语
Studies of meteorites and comets suggest that organic molecules are widespread a
Studies of meteorites and comets suggest that organic molecules are widespread a
游客
2024-01-02
30
管理
问题
Studies of meteorites and comets suggest that organic molecules are widespread among both asteroids and comets. Because each body in the solar system was repeatedly struck by asteroids and comets during the period known as the heavy bombardment (about 4 billion years ago), each body should have received at least some organic molecules. However, these molecules tend to be destroyed by solar radiation on surfaces unprotected by atmospheres. Moreover, while these molecules might stay
intact
beneath the surface (as they evidently do on asteroids and comets), they probably cannot react with each other unless some kind of liquid or gas is available to move them about. Thus, if we limit our search to worlds on which organic molecules are likely to be involved in chemical reactions, we can probably rule out any world that lacks both an atmosphere and a surface or subsurface liquid medium, such as water.
The word "intact" in the passage is closest in meaning to ________.
选项
A、buried
B、whole
C、confined
D、active
答案
B
解析
intact的本意为“完好无损的”,B项意为“完整的”,为其近义词。如果不知道intact的含义,还可以通过上下文推断出来。这个单词位于该段的第4句,说的是这些有机分子在大气层下的状况。其前一句为关键解题句,该句提到,在没有大气层保护的情况下,这些有机分子会被太阳辐射摧毁。因此,可推测stay intact在此处应该是与be destroyed相反的一个状况,B项最符合该处语境。
转载请注明原文地址:https://tihaiku.com/zcyy/3327715.html
相关试题推荐
"OrganicArchitecture"Oneofthemoststrikingpers
"OrganicArchitecture"Oneofthemoststrikingpers
"OrganicArchitecture"Oneofthemoststrikingpers
"OrganicArchitecture"Oneofthemoststrikingpers
"OrganicArchitecture"Oneofthemoststrikingpers
"OrganicArchitecture"Oneofthemoststrikingpers
"OrganicArchitecture"Oneofthemoststrikingpers
[img]2012q1/ct_etoefm_etoeflistz_0392_20121[/img][br]Whatdoesthemansuggest
StudiesbyPark,Burgess,andotherChicago-schoolsociologistsshowedhown
StudiesbyPark,Burgess,andotherChicago-schoolsociologistsshowedhown
随机试题
ReplyingtoourChristmas"goodguruguide",PeterDrucker,thegrandoldma
America’smostpopularnewspaperwebsitetodayannouncedthattheeraoffre
I’dratherreadbooksinthelibrary__________________(也不愿上课).thanattendclass
在实际教学中,体育教师应如何克服技能干扰( )A.同时教授细节相同的两种技能
特发性血小板减少性紫癜破坏血小板的主要场所:A.骨髓 B.肝脏 C.血
前列腺酸性磷酸酶的英文缩写是A.PSAB.PAPC.ALPD.AFPE.AFU
患者男,51岁,2年前无诱因出现柏油样便,伴头晕、乏力,但无腹痛、呕吐、呕血等。
子宫脱垂的病人使用子宫托的目的是A、支持子宫和阴道壁并使其维持在阴道内 B、使
下列关于债券发行方式的说法中不正确的是()。A:定向发行,又被称为“私募发行”、
某投资方案的初期投资额为1200万元,此后每年年末的净现金流量为400万
最新回复
(
0
)