首页
登录
职称英语
The finding that there were rock-melting temperatures on asteroids for susta
The finding that there were rock-melting temperatures on asteroids for susta
游客
2025-02-19
23
管理
问题
The finding that there were rock-melting temperatures on asteroids for sustained periods is puzzling: asteroids’ heat source is unknown, and unlike planet-sized bodies, such small bodies quickly dissipate heat. Rubin suggests that asteroids’ heat could have derived from collisions between asteroids. Skeptics have argued that a single impact would raise an asteroid’s overall temperature very little and that asteroids would cool too quickly between impacts to accumulate much heat. However, these objections assumed that asteroids are dense, solid bodies. A recent discovery that asteroids are highly porous makes Rubin’s hypothesis more plausible. When solid bodies collide, much debris is ejected, dissipating energy. Impacts on porous bodies generate less debris, so more energy goes into producing heat. Heat could be retained as debris fall back into impact craters, creating an insulating blanket. [br] The passage suggests that one factor that has made it difficult to account for the temperatures once reached by asteroids is
选项
A、a miscalculation of the frequency of asteroid collisions
B、a misconception about asteroids’ density
C、a mistaken assumption about what the heat source of the asteroids was
D、an underestimation of the rate at which small bodies lose heat
E、an erroneous view of how asteroids were formed
答案
B
解析
根据第一句可知,关于小行星温度的解释的困难主要在于热源和散热。根据怀疑者的观点可推导出,正是因为他们错误地假设了小行星是高密度的,才导致人们无法理解小行星的热源以及散热速度。之后人们发现小行星是多孔结构的,这时有关小行星热量的困惑就得到了解释,因此答案是选项B。
转载请注明原文地址:https://tihaiku.com/zcyy/3964201.html
相关试题推荐
Thefindingthattherewererock-meltingtemperaturesonasteroidsforsusta
Questions1-4Thetextrefersto6mainfindingswhenyoungIndianwomenweresu
Questions1-4Thetextrefersto6mainfindingswhenyoungIndianwomenweresu
Questions1-4Thetextrefersto6mainfindingswhenyoungIndianwomenweresu
Questions1-4Thetextrefersto6mainfindingswhenyoungIndianwomenweresu
Questions1-4Thetextrefersto6mainfindingswhenyoungIndianwomenweresu
Questions1-4Thetextrefersto6mainfindingswhenyoungIndianwomenweresu
GLOBALISATONFormany,thesurpriseoffindingaMcD
GLOBALISATONFormany,thesurpriseoffindingaMcD
GLOBALISATONFormany,thesurpriseoffindingaMcD
随机试题
[originaltext]Iamnotonlyapainter,butastudentofart.Sometimes,[20]
[originaltext]M:IhopeyouwillspendNewYear’sEvewithus.W:I’dloveto,
某北方地区框剪结构病房楼,地上19层,地下2层,一般装修,其建安工程单方造价为3
A.11.12 B.10.12 C.9.12 D.8.12
A.乳糜微粒 B.三酰甘油 C.胆固醇 D.高密度脂蛋白(HDL) E.
以下关于不良反应的论述何者不正确:A.副作用是难以避免的 B.变态反应与药物剂
关于钩端螺旋体病的流行病学,下列哪项是错误的A.病后可获得较强的同型免疫力及异型
一退休教师,小腿青筋怒张、迂曲20余年,久站久行或劳累时青筋迂曲加重,伴下坠不适
下列情形,不可以推定经营者具有市场支配地位的是()。A、一个经营者在相关市场的市
派出所民警讯问公共汽车上的一桩盗窃案的嫌疑人甲、乙、丙、丁的笔录如下: 甲说:
最新回复
(
0
)