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【单选题】
若复数p使得ξ(p)=0成立，则称p是ξ(p)的什么?A.
极小值点
B.
顶点
C.
拐点
D.
零点
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举一反三
【单选题】Which of the following statements about Greek mythology is true?
A.
Greek mythology is of little importance to modern civilization.
B.
Olympian gods and goddesses never made mistakes because they were all-knowing and morally perfect.
C.
The ancient Greeks used the myths to explain the world of their afterlife.
D.
Human heroes and monsters were important figures in Greek mythology.
【单选题】Which of the following statements about Greek mythology is true?
A.
Greeks believed only in one god.
B.
Greek gods and goddesses were flawless and didn't have any mental weaknesses.
C.
Greek mythology also tells the legend of heroes.
【单选题】若函数 y = f ( x )是定义在 R 上的减函数 , 则( )
A.
. f （ - 3 ） > f （ - 1 ）
B.
. f （ - 3 ） < f （ - 1 ）
C.
. f （ - 3 ） = f （ - 1 ）
D.
. f （- 3 ）与 f （- 1 ）的大小无法确定
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