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1998年1月托福考试阅读理解全真试题 [3]

论文作者:佚名论文属性:短文 essay登出时间:2009-09-24编辑:lisa点击率:16478

论文字数:1000论文编号:org200909241555371712语种:英语 English地区:中国价格:免费论文

关键词:全真试题

) To explain glassmaking technology
(D) To explain the purpose of each component of glass

11.The word "durable" in hue 3 is closest in meaning to
(A) lasting
(B) delicate
(C) heavy
(D) Plain

1 2. What does the author imply about the raw materials used to make glass?
(A) They were the same for centuries.
(B) They arc liquid
(C) They are transparent
(D) They are very heavy.

13.According to the passage, how is glass that has cooled and become rigid different from most other rigid substances?
(A) It has an interlocking crystal network.
(B) It has an unusually low melting temperature.
(C) It has varying physical properties.
(D) It has a random molecular structure.

14.The word "customarily" in line 13 is closest in meaning to
(A) naturally
(B) necessarily
(C) usually
(D) certainly

15.The words "exposed to" in line 19 are closest in meaning to
(A) hardened by
(B) chilled with
(C) subjected to
(D) deprived of

16.What must be done to release the internal stresses that build up in glass products during manufacture?
(A) the glass must be reheated and evenly cooled.
(B) the glass must be cooled quickly.
(C) The glass must be kept moist until cooled.
(D) The glass must be shaped to its desired form immediately

17.The word "induced" in line 21 is closest in meaning to
(A) joined
(B) missed
(C) caused
(D) lost

18.The word "it" in line 22 refers to
(A) feature
(B) glass
(C) manner
(D) viscosity

19.According to the passage. why can glass be more easily shaped into specific forms than can metals
(A)It resists breaking when heated
(B)It has better optical properties.
(C)It retains heat while its viscosity changes.
(D) It gradually becomes softer as its temperature rises.

Question 20-30

A great deal can be learned from the actual traces of ancient human locomotion: the footprints of early hominids. The best-known specimens are the remarkable tracks discovered at Lactoli, Tanzania, by Mary Leaky. These were left by small hominids around 3.6 to 3.75 million years ago, according to potassium – argon dates of the volcanic rocks above and below this level. These hominids walked across a stretch of moist volcanic ash, which was subsequently turned to mud by rain, and which then set like concrete.

Examination of he shape of the prints revealed to Mary Leakey that the feet had a raised arch, a rounded heel, a pronounced ball, and a big toe that pointed forward. These features, together with the weight-bearing pressure patterns, resembled the prints of upright-walking modern humans. The pressures exerted along the foot, together with the length of stride, which averaged 87 centimeters, indicated that the hominids had been walking slowly. In short, all the detectable morphological features implied that the feet that left the footprints were very little different from those of contemporary humans.

A detailed study has been made of the prints using photogrammetry, a technique for obtaining measurements through photographs, which created a drawing showing all the curves and contours of the prints. The result emphasized that there were at least seven points of similarity with modern bipedal prints, such as the depth of the heel impression, and the deep imprint of the big toe. M Day and E. Wickens also took ste论文英语论文网提供整理,提供论文代写英语论文代写代写论文代写英语论文代写留学生论文代写英文论文留学生论文代写相关核心关键词搜索。

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