单项选择题

In the author's opinion, ______.

A．theorists never need society
B．a scientist should not try to adapt himself to the world
C．a non-theorist never tries to adapt the world to himself
D．theorists should contribute to the progress of human society

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单项选择题

In Line 4. Paragraph 3, the word exacerbated is most similar in meaning to ______ .

A．caused
B．encouraged
C．forced to continue
D．aggravated

单项选择题

What can be inferred from the passage

A．Theorists tend to look cool and irrational because of their disdain for the public speculation.
B．People consider theorists separately because they are the rare and fascinating species scientifically.
C．As a matter a fact, theorists are full of strong feelings and obsessed with their research.
D．It is suggested that we tolerate theorists not out of our sense of humanity but for our selfish interests.