。。。
the rules are that go into the climate models that tell us about the future .”
Seientists found that whenever temperatures rose in the frozen record , so did carbon dioxide level .” In 440,000 years we have never seen greenhouse gas get as thick as it is today,” said Dr Wolff .
48．In drilling through the ice in Antarctica , scientists have found that .
A．the lowest temperature there is －40℃ 3,000 meters
C．the ice has existed for 15,000 years in certain patterns
49．The information of the global climate conditions in the past can be obtained
through .
A．separating carbon dioxide from the air B．examining the growth rings of trees C．comparing temperatures in different areas D．studying the ice and air caught in each layer A．there is something wrong with the data B．greenhouse effect is always a bad thing C．a new ice age will not come in the near future D．greenhouse gas will get thick in the future A．Research over the Antarctic area . B．Warm period to last about 15,000 years . C．Report on the eight ice ages in the past . D．Hollywood movies and the global climate .
E
No one can fail to stand in awed (令人敬畏的) admiration of the great discoveries of history —Newton’s laws of motion , Kepler’s pinciple of planetary movement , Einstein’s general theory of relativity . Equally awe-inspirine are artistic creations in painting , theatre , music , and literature , which have also been brought about by discovery ,through personal efforts . What do these extraordinary achievements well-known scientists and artists have to do with problem solving ?
A great scientific discovery or a great work of art is surely the result of problem-solving activity . The solution to a problem , we are told , often comes to thinkers in a “flash of insight (顿悟)” , although they may have been turning the problem over in their minds for some time . As a particular form of problem solving , these creative acts are based on the broad knowledge gained in the past , whether this be of the “public” sort known to science , or of the “private” sort known to the artist .
D．snowfalls are kept B．the depth of ice is
50．We can infer from Eric Wolff’s words that .
51．What would be the best title for the passage ?