英语四级阅读理解练习题第047组

e way the earths magnetic intensity is measured
C.its explanation of the shift in the earths polarity
D.the way the earths fluctuation rhythm is defined

5.In Peter Olsons opinion, the French experiment_____.
A.is likely to direct further research in the inner physics of the earth
B.has successfully solved the mystery of polarity reversals
C.is certain to help predict external disasters
D.has caused great confusion among the worlds geophysicists

责任编辑:yechenglu