单项选择题

What is the author's attitude towards assumptions based on statistical evidence

A．positive
B．objective
C．doubtful
D．optimistic
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单项选择题
The word evaporated in Line 3 of Paragraph 1 is closest in meaning to ______.
A．disappeared
B．transformed
C．worsened
D．emerged
单项选择题
It can be inferred from the passage that ______.
A．technological advances have a negative impact on the innovativeness of human beings
B．our knowledge has brought about a new understanding of us human beings
C．without true innovations, all that we have achieved are not so useful to human beings
D．people used to think old things better than new ones before the period of 1750 - 1950
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