更多"Archimedes was a famous Greek mathe"的相关试题:
[单项选择]Archimedes was a famous Greek mathematician and scientist. He was born around 287 BC and he died in the year 212 BC.
Archimedes is most well-known for one specific idea that he came up with. "Archimedes’s Principle" states that a solid object which is immersed in a liquid is pushed up by a force which is equal to the weight of the water that the object moves. For example, if you put a piece of wood and a piece of gold the same size in water, only the wood will float. Both the wood and gold move the same amount of water, but the wood weighs less than this water, while the gold weighs more.
It is believed that Archimedes discovered this principle when the king of Syracuse asked him to solve a problem. The king wanted to know if his crown was pure gold or a mixture of gold and silver. The king, of course, did not melt his crown to find out. The idea came to Archimedes as he lowered himself into his bath. He noticed how the water spilled out of the tub. He decided to use t
A. lifted
B. raised
C. rose
D. under water
[判断题]The mathematician studied science in Bronx High School of Science.
[判断题]The mathematician prefers to teach himself.
[判断题]The delightful book the mathematician mentions was written by G. H. Hardy.
[判断题]The mathematician thinks mathematics is both discovered and invented.
[判断题]The mathematician has a college degree.
[判断题]The mathematician was delighted to be admitted to Columbia University.
[判断题]The mathematician believes that there are two kinds of science.
[判断题]The mathematician would like to study a vast series of textbooks one by one.
[判断题]The mathematician was not allowed to use the Columbia University libraries.
[判断题]The mathematician felt very lucky to learn some courses on new and modern scientific fields.
[单项选择] In a recent article, mathematician Aczel argues convincingly that the number of planets suit able for life is extremely large. There are about 300 billion stars in our galaxy (银河系) and possibly 100 billion galaxies in the universe. Some may quarrel with Aczel’’s claim that as many as half of these stars can be presumed to have planets, and that on average one in nine of those planets is suitable for life; but few, I think, will disagree with his conclusion that there are a very large number of planets suitable for life.
The trouble starts when we come to estimate the probability that life will emerge on any of these planets. The problem is that we don’’t have a good theory of the origin of life on earth. Without one, it is anybody’’s guess how likely this event actually was. Out of thin air Aczel conjures (想像) the figure of 1 in a trillion for this likelihood and concludes that the probability of life existing on at least one other planet is virtually 1.
Statistics are extre
A. positive
B. objective
C. doubtful
D. optimistic
