[問題]考古題2002年02月第5篇Q47(reading)

[kimomans]

全文如下
Question 41-50
The Moon, which has undergone a distinct and complex geological history, presents a striking appearance. The moon may be divided into two major terrains: the maria (dark
lowlands) and the terrace( bright highlands). The contrast in the reflectivity (the capability of reflecting light ) of these two terrains suggested to many early observers that the two terrains might have different compositions, and this supposition was confirmed by missions to the Moon such as Surveyor and Apollo. One of the most obvious differences between the terrains is the smoothness of the maria in contrast to the roughness of the highlands. This roughness is mostly caused by the abundance of craters; the highlands are completely covered by large craters( greater than 40-50 km in diameter), while the craters of the maria tend to be much smaller. It is now known that the vast majority of the Moon’s craters were formed by the impact of solid bodies with the lunar surface.
Most of the near side of the Moon was thoroughly mapped and studied from telescopic pictures years before the age of space exploration. Earth-based telescopes can resolve objects as small as a few hundred meters on the lunar surface. Close observation of craters, combined with the way the Moon diffusely reflects sunlight, led to the understanding that the Moon is covered by a surface layer, or regolith, that overlies the solid rock of the Moon. Telescopic images permitted the cataloging of a bewildering array of land forms. Craters were studied for clues to their origin; the large circular maria were
seen. Strange, sinuous features were observed in the maria. Although various land forms were catalogued, the majority of astronomers’ attention was fixed on craters and their origins.
Astronomers have known for a fairly long time that the shape of craters changes as they increase in size. Small craters with diameters of less than 10-15 km have relatively simple shapes. They have rim crests that are elevated above the surrounding terrain, smooth, bowl-shaped interiors, and depths that are about one-fifth to one-sixth their diameters. The complexity of shape increases for larger craters.
47. All of the following terms are defined in the passage EXCEPT
(A) Moon (line1)
(B) reflectivity(line3)
(C) regolith(line16)
(D) rays(line19)
答案 C
我的問題如下
First: D選項在哪兒我找不到
Second : C如下
Close observation of craters, combined with the way the Moon diffusely reflects sunlight, led to the understanding that the Moon is covered by a surface layer, or regolith, that overlies the solid rock of the Moon.
regolith不是已經由that後面解釋說明嗎??怎可選這個????
我手上另依PDF版詳解的解釋我覺怪怪的,所以問問各位牛人的意見啦
謝謝
另外 對不起大家
版面我怎嚜排都怪怪的,搞不定,就是會跳行,敬請大家多多見諒

[kimomans]

為求大家看文的方便
小弟再把PDF版的上傳
這是詳解
可是沒說到我的疑問
還有
他這題的選項跟我的WORD版不一樣