首页
登录
职称英语
[originaltext] Astronomers are still learning about sunspots and about their
[originaltext] Astronomers are still learning about sunspots and about their
游客
2023-09-13
37
管理
问题
Astronomers are still learning about sunspots and about their effects on us, but believe that the spots on the sun, which were first observed through a telescope by Galileo in 1610, are electrical in nature.
Sunspots vary in size from what appear to be small specks on the sun’s surface, to at least 90,000 miles long, and 200,000 miles in length, and are visible on most clear days.
When sunspots release their electrical energy, they shoot beams of negatively charged electrons into space, some of which escape into the Earth’s atmosphere. These electrons create electrical effects, such as the aurora borealis, or Northern Lights, cause the disruption of radio transmissions, and increase the amount of ozone in the upper atmosphere. The additional ozone may absorb more than the usual amount of the sun’s heat, which in turn may affect our weather.
The sunspot cycle, is a recurring 11-year period over which the number of sunspots fluctuates and corresponds to the number of sun flares. An increase in the number of sun flares leads to an increase in the number of sunspots, and a decrease in the number of sun flares leads to a decrease in the number of sunspots,
Records of sunspots have only been kept for the last 100 years or so, leaving astronomers with little to back their research and much yet to discover about this phenomenon.
选项
A、More electrons will be released into space.
B、Radio transmission will be disrupted.
C、The weather may be affected.
D、The sunspot cycle will be shortened.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3011256.html
相关试题推荐
[originaltext]Why,youmaywonder,shouldspidersbeourfriends?Becauseth
[originaltext]Why,youmaywonder,shouldspidersbeourfriends?Becauseth
[originaltext]Underthemedia’sspotlight,Iran’sforeignMinisterKamalKha
[originaltext]Underthemedia’sspotlight,Iran’sforeignMinisterKamalKha
[originaltext]IwasbornjustaftertheendoftheWorldWarH,soIhaveli
[originaltext]W:Oh,Jack.I’mgladIcaughtyou.IwanttotellyouIhaveto
[originaltext]W:Oh,Jack.I’mgladIcaughtyou.IwanttotellyouIhaveto
[originaltext]W:Oh,Jack.I’mgladIcaughtyou.IwanttotellyouIhaveto
[originaltext]Toooftenyoungpeoplegetthemselvesemployedquitebyaccide
[originaltext]Toooftenyoungpeoplegetthemselvesemployedquitebyaccide
随机试题
Todayisoneofthehappiestandsaddestdaysinmylife.Iamveryhappyth
[originaltext]Andnow,ifyou’llwalkthisway,[9-1]ladiesandgentlemen,the
DNAsequencesfromsomeofthemostdeadlypathogens(病原体)knowntomancanbe
Forthispart,youareallowed30minutestowriteashortessayentitledMyVie
A.B所受摩擦力始终不可能为零,摩擦力方向时而沿斜面向上时而沿斜面向下 B.B
天津清代诗人梅成栋是当时天津诗坛公认的领袖,著有()。A.《四书讲义》 B
行业的市场结构可以分为( )。 Ⅰ完全竞争 Ⅱ垄断竞争 Ⅲ寡头垄断
施工成本计划的编制以成本预测为基础,关键是确定目标成本。按施工成本组成编制成本计
在2008年8月8日至24日奥运会期间,北京市的空气质量不仅天天达标,而且有10
(2020年真题)某拟建项目,建筑安装工程费为11.2亿元,设备及工器具购置费为
最新回复
(
0
)