The tone of the author in this passage is most probably______.
A. concerned
B. objective
C. optimistic
D. indifferent
查看答案
A．instructiveB．usefulC．harmfulD．proper
A. instructive
B. useful
C. harmful
D. proper
A．otherB．othersC．anotherD．the others
A. other
B. others
C. another
D. the others
John usually went to school in his father's car.
A. Right.
B. Wrong.
C. Doesn't Say.
The passage says that until recently scientists disagreed with the idea that______.
A. there are self-evident principles
B. there are mysterious forces in the universe
C. man cannot discover what forces "really" are
D. we can discover why things behave as they do
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