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【单选题】
设函数f在(a,b)连续,且f(a+0)与f(b-0)= ,则()。A.
f在(a,b)内能取得最小值
B.
f在(a,b)内不能取得最小值
C.
f在(a,b)内能取得最大值
D.
f在(a,b)内不能取得最大值
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反馈参考答案：
举一反三
【单选题】The author cites each of the following as possible influences in a Black worker's decision to migrate north in the Great Migration EXCEPT______.
A.
wage levels in northern cities
B.
labor recruiters
C.
competition from rural workers
D.
voting rights in northern states
【单选题】The author cites each of the following as possible influences in a Black worker’s decision to migrate north in the Great Migration EXCEPT______
A.
wage levels in northern cities
B.
labor recruiters
C.
competition from rural workers
D.
voting rights in northern states
E.
the Black press
【单选题】The author cites the American Medical Association's advice in paragraph 4 in order to ______.
A.
present more factual details to clarify the issue
B.
present an alternative theory for consideration
C.
present a recommendation from a reputable source
D.
present a solution drawn from all the evidence considered
【简答题】太阳系中离太阳最近的行星是
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