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【单选题】
某男，3岁，易患感冒，反复出现左心功能不全的症状，胸骨左缘第2肋间听到响亮粗糙的连续性机器样杂音，锁骨下窝或颈部和背部传导，局部可扪及震颤，四肢动脉可扪及水冲脉和听到枪击声。 首先应考虑到的诊断是（ ）A.
动脉导管未闭
B.
室间隔缺损
C.
房间隔缺损
D.
法洛氏四联症
E.
二尖瓣狭窄
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举一反三
【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
【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.
【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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