A.顺序性
B.阶段性
C.不平衡性
D.互补性
E.个别差异性
第1题
证明对于任意向量ri(i=1,2,3,4)下式成立:(r1×r2)·(r3×r4)+(r1×r3)·(r4×r2)+(r1×r4)·(r2×r3)=0.
第2题
A.ρ={R1(AC),R2(ED),R3(B)}
B.ρ={R1(AC),R2(E),R3(DB)}
C.ρ={R1(AC),R2(ED),R3(AB)}
D.ρ={R1(ABC),R2(ED),R3(ACE)}
第3题
A.ρ={R1(AC),R2(ED),R3(B)}
B.ρ={R1(AC),R2(E),R3(DB)}
C.ρ={R1(AC),R2(ED),R3(AB)}
D.ρ={R1(ABC),R2(ED),R3(ACE)}
第4题
A.ρ={R1(AC),R2(ED),R3(AB)}
B.ρ={R1(ABC),R2(ED),R3(ACE)}
C.ρ={R1(ABC),R2(ED),R3(AE)}
D.ρ={R1(ACE),R2(ED),R3(AB)}
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