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【单选题】
对第2自然两处破折号的作用的分析,正确的一项是( )
A.
A .两处都是解释说明。
B.
第一处是解释说明,第二处是补充说明。
C.
两处都是补充说明。
D.
第一处是补充说明,第二处是解释说明。
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a delicate art
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Because she is afraid of bad weather.
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D.
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【简答题】若首项为a 1 ,公比为q的等比数列的前n项和总小于这个数列的各项和,则首项a 1 ,公比q的一组取值可以是(a 1 ,q)=(    )。
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【简答题】设数列8,a 2 ,a 3 ,a 4 是等比数列,其公比q不是整数,且q>1,则这个数列中a 4 可取到的最小值为______.
【单选题】已知函数f(x)= 3 cosx+sinx+4的值域为M,在M中取三个不相等的数y 1 、y 2 、y 3 ,使之构成公比为q的等比数列,则公比q的取值范围为 (  )
A.
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B.
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