![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
在等腰三角形ABC中,AB=AC,其周长为20cm,则AB长的取值范围是()
A.1cm<AB<4cm
B.5cm<AB<10cm
C.4cm<AB<8cm
D.4cm<AB<10cm
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
B、5cm<AB<10cm
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.1cm<AB<4cm
B.5cm<AB<10cm
C.4cm<AB<8cm
D.4cm<AB<10cm
B、5cm<AB<10cm
A.(AB)C
B.AC(B)
C.A(BC)
D.所有效率都相同
A.若ABC=E,则A,B,C都可逆
B.若AB=AC,且A可逆,则B=C
C.若AB=AC,且A可逆,则BA=CA
D.若AB=O,且A≠O,则B=O
A.选①②
B.选①③
C.选②③
D.选②④