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【单选题】A) To carry out a scientific survey. B) To establish a new research station. C) To rescue two sick American workers. D) To deliver urgent medical supplies.
A.
To carry out a scientific survey.
B.
To establish a new research station.
C.
To rescue two sick American workers.
D.
To deliver urgent medical supplies.
【简答题】Questions 3 and 4 are based on the news report you have just heard . 3. ________ A ) To carry out a scientific survey . B ) To establish a new research station . C ) To rescue two sick American worker...
【单选题】根据材料，回答题。 Stars in Their Eyes The ScientifiC．American Book of the Cosmos edited by David Levy， Macmillan， 20， ISBN 0333782933 Previous generations of scientists would have killed to know what we know....
A.
Tegmark fears he may hold the record for the longest time taken to read one book.
B.
In a more positive vein， this is a wonderful collection of essays to dip in and out of if you already have a good overview （概述） of current cosmiC．understanding.
C.
Levy is an active astronomer and an accomplished writer， so you'd expect him to provide a broad and accurate picture of our current understanding of the cosmos.
D.
ScientifiC．American has attempted to cater to this need by bringing together essays that have appeared in the magazine.
E.
To some extent， these could have been plugged with a glossary （词表） of terms.
F.
Also included are contributions on the world of subatomiC．particles， the origin of life on the Earth and the possibility of its existence elsewhere.
【单选题】The author mentioned many inventors in the first paragraph to______.
A.
remind American of their historical heritage
B.
highlight American' s loss of supremacy in scientific innovation
C.
describe the heyday of America in science and innnovation
D.
express his regret for the decline of American national power
【简答题】在幂法的迭代公式 中,当向量 和 的各个分量 时, 是 特征值的近似值, 是相应的特征向量。
【单选题】A) To carry out a scientific survey. B) To establish a new research station. C) To rescue two sick American workers. D) To deliver urgent medical supplies.
A.
To carry out a scientific survey.
B.
To establish a new research station.
C.
To rescue two sick American workers.
D.
To deliver urgent medical supplies.
【简答题】Read the article below from the magazine Scientific American. Underline the key facts in Para. 2-4. The first paragraph is done for you as an example. Centuries of silence cannot keep ancient mummies ...
【单选题】The main purpose of this passage is to_____．
A.
restore American students’interest in science
B.
keep American alert to the rise of other nations
C.
warn American of the decline of their scientific edge
D.
urge government to invest more in education and research
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