函数y=log2 (x+1)的定义域是（）
A.[img src="https://img.haodaxue.net/uploadimg/ico/2020/0606/1591431491262564.png" />
B.[img src="https://img.haodaxue.net/uploadimg/ico/2020/0606/1591431496958558.png" />
C.[img src="https://img.haodaxue.net/uploadimg/ico/2020/0606/1591431501504886.png" />
D.[img src="https://img.haodaxue.net/uploadimg/ico/2020/0606/1591431507202359.png" />
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正确答案： B 答案分析：无
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