第5题
()all the inventions have in common is ()they have succeeded.
A.That, what
B.What, that
C.That, that
D.What, what
第8题
A.inv(A)* inv(B)*C
B.inv(B)* inv(B)*C
C.inv(A)*C* inv(B)
D.inv(B)*C* inv(A)
第9题
A.inv([4,2,-1;3,-1,2;12,3,0])*[2,20,8]
B.inv([4,2,-1;3,-1,2;12,3,0])*[2,20,8]'
C.inv([4,2,-1;3,-1,2;12,3,0])\[2,20,8]
D.[2,20,8]*inv([4,2,-1;3,-1,2;12,3,0])
第10题
A.inv(A)* inv(B)*C
B.inv(B)* inv(B)*C
C.inv(A)*C* inv(B)
D.inv(B)*C* inv(A)
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