单项选择题
图示体系为:()
A.几何不变无多余约束B.几何不变有多余约束C.几何常变D.几何瞬变
A.―1<M ≤―0.5和0.5≤M <1B.―1≤M ≤―0.5和0.5≤M ≤1C.―1≤M <―0.5和0.5≤M <1D.―1<M <―0.5和0.5<M ≤1