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【简答题】
设a∈R，函数f（x）=ax 3 -2x 2 -4ax， （1）若x=2是函数y=f（x）的极值点，求a的值； （2）在（1）的条件下，求函数f（x）在区间[-1，5]上的最值． （3）是否存在实数a，使得函数f（x）在R上为单调函数，若是，求出a的取值范围，若不是，请说明理由．
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12小时
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contribute to
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hold on to
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begin with
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take a toll on
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A.
contrast with
B.
contribute to
C.
commit to
D.
confront with
【简答题】Low-cost airlines are emerging all over Asia; this will the development of the world's air-travel market as a whole.
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A.
contribute to
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devote to
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add to
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stick to
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A.
early
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quickly
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late
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easily
【简答题】外国人在旅馆以外的其他住所居住或者住宿的,应当在入住后( )小时内由本人或者留宿人,向居住地的公安机关办理登记。
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