Which of the following is true according to the first paragraph？
A. Video games are usually considered harmful to one"s mind.
B. Video games involving shooting will lead to violent behaviors.
C. People"s views toward video games have always been controversial.
D. Video games will influence the youth throughout their lives.
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What can we infer from the last paragraph？
A. General relativity is actually ungrounded at all.
B. The calculation of the orbits shows that equivalence principle is violated.
C. More should be done to prove the correctness of equivalence principle.
D. A new revolution in physics has already arrived.
The growth of American agriculture has been mainly stimulated by
A. the productivity growth.
B. low prices of food.
C. rising standards of living.
D. the exportable surplus.
Scientists present at the "Rethinking Gravity" conference
A. unanimously believe that Einstein"s general theory of relativity is wrong.
B. have found further problems about the general theory of relativity.
C. question the assumptions of the general theory of relativity.
D. are trying to find out the possible flaws of the gravity theory.
It is stated in Paragraph 1 that the theory of relativity
A. is beyond all the current scientists" understanding.
B. has failed Albert Einstein for years.
C. seems at odds with the quantum mechanics.
D. is useful in holding big things together.
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