TOEFL阅读真题精选
为了让大家更好的预备托福考试，我给大家整理一些托福阅读真题，下面我就和大家共享，来观赏一下吧。
托福阅读真题1
There are only a few clues in the rock record about climate in the Proterozoic eon. Much of our information about climate in the more recent periods of geologic history comes from the fossil record, becau we have a reasonably good understanding of the types of environment in which many fossil organisms flourished. The scarce fossils of the Proterozoic, mostly single-celled bacteria, provide little evidence in this regard. However, the rocks themlves do include the earliest evidence for glaciation, probably a global ice age.
The inference that some types of dimentary rocks are the result of glacial activity is bad on the principle of uniformitarianism, which posits that natural process now at work
on and within the Earth operated in the same manner in the distant past. The deposits associated with prent-day glaciers have been well studied, and some of their characteristics are quite distinctive. In 2.3-billion-year-old rocks in Canada near Lake Huron (dating from the early part of the Proterozoic age), there are thin laminae of fine-grained diments that remble varves, the annual layers of diment deposited in glacial lakes. Typically, prent-day varves show two-layered annual cycle, one layer corresponding to the rapid ice melting and diment transport of the summer ason, and the other, finer-grained, layer corresponding to slower winter deposition. Although it is not easy to discern such details in the Proterozoic examples, they are almost certainly glacial varves. The fine-grained, layered diments even contain occasional large pebbles or dropstones, a characteristic feature of glacial environments where coar material is sometimes carried on floating ice and dropped far from its source, into otherwi very fine grained diment. Glacial diments of about the same age as tho in Canada have been found in other parts of North America and in Africa, India, and Europe. This indicates that the glaciation was global, and that for a period of time in the early Proterozoic the Earth was gripped in an ice age.
Following the early Proterozoic glaciation, however, the climate appears to have been fairly benign for a very long time. There is no evidence for glaciation for the next 1.5 billion years or so. Then, suddenly, the rock record indicates a ries of glacial episodes between about 850 and 600 million year ago, near the end of the Proterozoic eon.
1. Which of the following does the passage mainly discuss?
(A) How patterns in rock layers have been ud to construct theories about the climate of the
Proterozoic age
(B) What some rare fossils indicate about glacial conditions during the late Proterozoic age
两只小狮子 (C) The varying characteristics of Proterozoic glacial varves in different parts of the world
(D) The number of glacial episodes that the Earth has experienced since the Proterozoic age
2. According to the passage , the fossil record of the Proterozoic eon is
(A) highly regarded becau it prerves the remains of many kinds of organisms
(B) less informative than the fossil record of more recent periods
(C) very difficult to interpret due to damage from bacteria 得到你的人
(D) more uful to rearchers than otheraspects of the rock record
3. The word scarce in line 4 is clost in meaning to
(A) ancient
(B) tiny
(C) available
(D) rare
4. It can be inferred from the passage that the principle of uniformitarianism indicates
(A) similar conditions produce similar rock formations
(B) rock layers in a given region remain undisturbed over time
(C) different kinds of dimentary rocks may have similar origins
(D) each continent has its own distinctive pattern of diment layers
介休绵山 5. The word remble in line 14 is clost in meaning to
怎样做猪肉丸子
(A) result from
心理电影 (B) penetrate
(C) look like
(D) replace have similar origins
6. According to the passage , the layers in varves are primarily formed by
(A) fossilized bacteria
探求的近义词 (B) pieces of ancient dropstones
(C) a combination of ancient and recent diments
(D) annual cycles of diment transport and deposition
7. The phra the other in line 17 refers to another
(A) annual cycle
(B) glacial lake
中国古代四大名妓
(C) layer of diment
(D) ason
8. According to the passage , the prence of dropstones indicates that
(A) the glacial environment has been unusually rvere
(B) the fine-grained diment has built up very slowly
(C) there has been a global ice age
(D) coar rock material has been carried great distances
9. Why does the author mention Canada, North America, Africa, India, and Europe in lines 23-24?
(A) To demonstrate the global spread of dropstones
(B) To explain the principles of varve formation
(C) To provide evidence for the theory that there was a global ice age in the early Proterozoic eon
(D) To illustrate the varied climatic changes of the Proterozoic eon in different parts of the globe
你是我的唯一英文
10. Which of the following terms is defined in the passage ?
(A) fossil record (line 3)
(B) laminae (line 13)
(C) varves (line14)
(D) glacial episodes (line 28)
PASSAGE 92 ABDAC DCCCC
托福阅读真题2
In 1900 the United States had only three cities with more than a million residents — New York, Chicago, and Philadelphia. By 1930, it had ten giant metropolis. The newer ones experienced remarkable growth, which reflected basic changes in the economy.
