单项选择题

From the passage, it can be inferred that _________.

A．rewards are highly effective in America
B．rewards are not much sought-after in academic circles
C．rewards have long lost their appeal in American society
D．Americans are addicted to rewards

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单项选择题

What can't be inferred from the 1st paragraph

A．Scientific experiments in the past three hundred years have produced many valuable items.
B．For three hundred years there have been people holding hostile attitude toward science.
C．Modern civilization depends on science so man supports scientific progress unanimously.
D．Three hundred years is not long enough to settle back critical appraisal of scientific method.

单项选择题

The writer's attitude towards science is _________.

A．critical
B．approving
C．neutral
D．regretful