![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
在平面直角坐标系中,点A(1,2a+3)在第一象限,且到x轴的距离与到y轴的距离相等,则a是()
A.-1
B.2
C.-2
D.1
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
A、-1
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.-1
B.2
C.-2
D.1
A、-1
A.(-2,1)
B.(0,1)
C.(7,-1)
D.(2.5,0)
A.(2,5)
B.(-8,5)
C.(-8,-1)
D.(2,-1)
A.(4,2)
B.(5,2)
C.(5,3)
D.(6,2)
A.(-1,1)
B.(1,1)
C.(-1,-2)
D.(1,-2)