单项选择题

The word "scrutinize" (Paragraph 2) can be best replaced by ______.

A．"improve"
B．"examine closely"
C．"experiment with"
D．"make use of"
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单项选择题
Why, according to the author, is a man so keen to join in conversation
A．In order to assert his superiority.
B．In order to prove that he is a rational, living being.
C．In order to communicate ideas which he considers important.
D．To prove that he is not a worthless person.
单项选择题
According to the first paragraph, human beings' attitude towards the early computers can best be described as ______.
A．indifferent
B．ambiguous
C．contemptuous
D．hostile
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