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【单选题】
定义域是一切实数的函数 ，其图像是连续不断的，且存在常数 ( ) 使得 对任意实数 都成立，则称 是一个“ —伴随函数”． 有 下列关于“ —伴随函数”的结论： ① 是常数函数中唯一一个“ —伴随函数”； ②“ —伴随函数”至少有一个零点； ③ 是一个“ —伴随函数”； 其中正确结论的个数是 （ ）A.
1个；
B.
2个；
C.
3个；
D.
0个；
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【单选题】My grandfather Jack is 76 years old, and he has had an interesting life. He has travelled a lot in his life in the Far East. He visited the Taj Mahal in India and the pyramids in Egypt. He hunted lio...
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