Which of the following is TRUE according to the passage？
A. The farm in Tianjin was first to announce a suspected outbreak.
B. The bird flu virus has spread over most provinces of China.
C. Up till now, nobody in China is infected by the virus.
D. The virus found in China comes from Vietnam.
查看答案
Which of the following is the best title for the passage？
A. Polarity Reversal: A Fantastic Phenomenon of Nature.
B. Measurement of the Earth's Magnetic-Field Intensity.
C. Formation of the Two Poles of the Earth.
D. A New Approach to the Study of Geophysics.
In Peter Olson's 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 world's geophysicists
【B6】
A. imported
B. donated
C. transported
D. purchased
The French Geophysicists' study is different from currently prevailing theories in ______.
A. its identification of the origin of the earth's magnetic field
B. the way the earth's magnetic intensity is measured
C. its explanation of the shift in the earth's polarity
D. the way the earth's fluctuation rhythm is defined
微信支付 
支付宝支付