首页
登录
职称英语
Light travels very fast. It moves at a speed of 300,000 kilometers a second.
Light travels very fast. It moves at a speed of 300,000 kilometers a second.
游客
2024-07-20
41
管理
问题
Light travels very fast. It moves at a speed of 300,000 kilometers a second. Light reaches us from the moon in less than a second and a half. The moon is about 382,000 kilometers away.
Light from the sun reaches us in 8.5 minutes. The sun is about 149,840,000 kilometers from the earth.
The other stars are farther away than the sun. Light from the nearest star reaches us in about four years. When you look at a star, you do not see its present condition. You see it as it used to be. Light from some stars takes hundreds of years to reach us. We never see a star as it is now. We see it as it was long ago; perhaps hundreds of thousands of years ago.
Astronomers (天文学家) watch the stars through big telescopes. The world’s biggest telescope is in Russia. The next biggest is in-the United States. With these great telescopes astronomers can see stars and other things very far away. Some of these things are not only stars. They are great groups of stars.
选项
A、more time than
B、less time than
C、as much time as
D、less years than
答案
A
解析
本题题干问“比较太阳光和月亮光到达地球的时间”。原文第1段第2句话指出月亮光到达地球大约用1.5秒,原文第2段第1句话指出太阳光到达地球大约用8.5分钟。因此选项A. more time than是正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3685866.html
相关试题推荐
随机试题
OstrichchicksrearedonfarmsA、mustbekeptinincubatorsuntilmature.B、arev
Thestatistics______thatlivingstandardsintheareahaveimproveddrastically
2012年4月29日,某淀粉厂的4号车间包装工段突然发生淀粉粉尘爆炸起火。一瞬间
肱骨髁上骨折好发于A.老年女性 B.老年男性 C.中年女性 D.中年男性
(2019年真题)效用理论所衡量的主观价值中,是基于( )A.需求的视角 B
关于缺铁性贫血的铁剂治疗,以下说法正确的是A.注射铁剂有效 B.口服铁剂与维生
最适宜用于鉴别原粒和原淋的细胞化学染色是( )。A.过氧化物酶 B.糖原
缩写词q.2d.在处方中代表的含义是A:每日2次 B:每2日1次 C:每月2
()应同时在证券发行募集文件上签字。A:保荐机构法定代表人、保荐业务负责人 B
三资企业和来料加工企业生产出口食品的加工厂、库,可以申请免予办理出口食品厂、库卫
最新回复
(
0
)