2. 考研
  3. To understand how astrology works, we should first take a quick look at the sky. Although the stars are at enormous distances, t

To understand how astrology works, we should first take a quick look at the sky. Although the stars are at enormous distances, t

admin2012-06-02  64
问题     To understand how astrology works, we should first take a quick look at the sky. Although the stars are at enormous distances, they do indeed give the impression of being affixed to the inner surface of a great hollow sphere surrounding the earth. Ancient people, in fact, literally believed in the existence of such a celestial sphere. As the earth spins on its axis, the celestial sphere appears to turn about us each day, pivoting at points on a line with the earth’s axis of rotation. This daily turning of the sphere carries the stars around the sky, causing most of them to rise and set, but they, and constellations they define, maintain fixed patterns on the sphere, just as the continent of Australia maintains its shape on a spinning globe of the earth. Thus the stars were called fixed stars.
    The motion of the sun along the ecliptic is, of course, merely a reflection of the revolution of the earth around the sun, but the ancients believed the earth was fixed and the sun had an independent motion of its own, eastward among the stars. The glare of sunlight hides the stars in daytime, but the ancients were aware that the stars were up there even at night, and the slow eastward motion of the sun around the sky, at the rate of about thirty degrees each month, caused different stars to be visible at night at different times of the year.
    The moon, revolving around the earth each month, also has an independent motion in the sky. The moon, however, changes it position relatively rapidly. Although it appears to rise and set each day, as does nearly everything else in the sky, we can see the moon changing position during as short an interval as an hour or so. The moon’s path around the earth lies nearly in the same plane as the earth’s path around the sun, so the moon is never seen very far from the ecliptic in the sky. There are five other objects visible to the naked eye that also appear to move in respect to the fixed background of stars on the celestial sphere. These are the planets Mercury, Venus, Mars, Jupiter, and Saturn. All of them revolve around the sun in nearly the same plane as the earth does. So they, like the moon, always appear near the ecliptic. Because we see the planets from the moving earth, however, they behave in a complicated way, with their apparent motions on the celestial sphere reflecting both their own independent motions around the sun and our motion as well.
According to the last paragraph, five other planets
选项 A、always appear near the path of the sun.
B、aren’t moving around the sun as independently as the earth does.
C、are moving in a way that can not be recognized.
D、are moving around the sun at the same speed as the earth does.
答案A
解析 事实细节题。第三段提到，因为这五个星球都在同一平面围绕着太阳转动，所以它们经常出现在黄道附近，而黄道就是太阳运动的轨迹。因此，[A]正确。[B]与原文内容相反，它们都是围绕着太阳转动的。[C]说它们的运动轨迹无法辨认，也与原文不符，它们都是围绕着太阳在同一平面 转动的。[D]项内容则未在原文中出现，原文没有将它们的运动速度与地球的速度做比较。
转载请注明原文地址:https://kaotiyun.com/show/Uup4777K
0

考研英语一

相关试题推荐
随机试题
最新回复(0)