(2/2)e having D.is having为什么选B?

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• 英语翻译
• 若不等式0≤x+1≤2成立时,关于x的不等式x-a-1＞0也成立,求实数a的取值范围 x-a-1＞0中x的范围大于1了不就不符合题意了吗