The highest speed of fault ruptures in the 1906 quake was more than 3.5 kilometers per second．
A. Right
B. Wrong
C. Not mentioned
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Which of the following statements is NOT true of ants？
Ants know very soon that another ant is dead．
B. When an ant is dead，others move its body out of the nest．
C. If an ant is unconscious，it is moved out of the nest．
D. Living ants have the“I'm dead”chemical on their bodies．
It's actually surprising that not everyone has absolute pitch.
A. Levitin
B. deutsch
C. Gregersen
D. Marvin
E. Freimer
The perfect pitch ability is genetic.
A. Levitin
B. deutsch
C. Gregersen
D. Marvin
E. Freimer
Tourists have learnt to make investigations about tour operators before using them.
A. YES
B. NO
C. NOT GIVEN
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