单项选择题

It can be concluded from the passage that the "big bang" theory is ______.

A．a fact
B．a disproved hypothesis
C．an unsupported opinion
D．an idea with some supporting evidence
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单项选择题
The primary purpose of this passage is to ______.
A．argue for a ban on the capture of whales and dolphins
B．describe the evolution of whales
C．report a possible explanation for the lack of teeth marks on whales' victims
D．reveal the flaws in the "big bang" theory of cetacean predation
单项选择题
As used in the passage, moderate most nearly means ______.
A．direct
B．lessen
C．move to middle
D．use
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