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13 to 22 are based on this passage
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Question 13
The author mentions the “Prozac lag” primarily in order to
A. raise a possible objection to a newly proposed theory
B. present a situation for which a new theory may serve an explanatory role
C. offer evidence that runs counter to a previously held belief
D. suggest a counterexample that undermines a newly proposed theory
E. provide supporting evidence that a newly discovered phenomenon may have unforeseen effects
我的答案： 无