B.The European Union is waiting for all its members’approval.
C.China and India have agreed to cut carbondioxide emissions.
D.South Africa doesn’t think much of this conference.
59.What is Obama’s attitude according to his words?
A.Doubtful.
B.Positive.
C.Negative.
D.Regretful.
60.________is the reason of global warming according to the skeptics.
A.Human activity
B.Fossil fuels
C.The cutting down of trees
D.Natural climate change
B
By analyzing academic data from 10 states,representing the testing of more than 7.2 millions of youths,US researchers found that gender differences in math scores were extremely small among all ethnic groups in grades 211.
These findings are in contrast to earlier results from 1990 that indicate measurable differences favoring males in complex problemsolving,beginning in the high school years.
Janet Hyde from University of Wisconsin and colleagues reported their study results in the journal Science on Friday.
Currently,women are largely absent from the highest levels of careers in mathematics,the physical sciences,and engineering.In the United States,Ph.D.programs in engineering currently average only about 15 percent women,and similar statistics have led to stereotypes (成见) about girls and women lacking in mathematical ability.
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