单项选择题

According to the passage, mathematicians present a danger to scientists because ______.

A．mathematicians may provide theories that are incompatible with those already developed by scientists
B．mathematicians may define situation in a way that is incomprehensible to scientists
C．mathematicians may convince scientists that theoretical assumptions are facts
D．scientists may come to believe that axiomatic statements are untrue

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单项选择题The author's attitude toward Sophocles's statement is ______.

A．positive
B．negative
C．neutral
D．not mentioned

单项选择题The author implies that scientists develop a healthy skepticism because they are aware that ______.

A．mathematicians are better able to solve problems than scientists
B．changes in axiomatic propositions will inevitably undermine scientific arguments
C．well-defined situations are necessary for the design of reliable experiments
D．some factors in most situations must remain unknown

单项选择题Assumptions are important for critical readers because they can help readers to ______.

A．grasp the topic exactly
B．understand the argument passage exactly
C．evaluate the argument passage
D．compare the argument passage with similar argument passages

单项选择题What can we infer from the passage

A．A good writer should clearly state all his assumptions.
B．Once we find assumptions, we will find the writer's problems.
C．We need not clearly express our assumptions in oral communication.
D．Major assumptions are important for both the writer and the reader.

单项选择题According to this passage, an assumption is ______.

A．something that everyone knows
B．the idea the writer wants to emphasize
C．the reader's knowledge about the topic
D．foundation of the writer's reasoning