.集合A={1,2,x},集合B={2,4,5},若={1,2,3,4,5},则x=( ).集合A={1,2,x},集合B={2,4,5},若={1,2,3,4,5},则x=( )A.1 B.3 C.4 D.5

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.集合A={1,2,x},集合B={2,4,5},若={1,2,3,4,5},则x=( ).集合A={1,2,x},集合B={2,4,5},若={1,2,3,4,5},则x=( )A.1 B.3 C.4 D.5
.集合A={1,2,x},集合B={2,4,5},若={1,2,3,4,5},则x=( )
.集合A={1,2,x},集合B={2,4,5},若={1,2,3,4,5},则x=( )
A.1 B.3 C.4 D.5

.集合A={1,2,x},集合B={2,4,5},若={1,2,3,4,5},则x=( ).集合A={1,2,x},集合B={2,4,5},若={1,2,3,4,5},则x=( )A.1 B.3 C.4 D.5
B