gaokao 2015 Q1

gaokao · China · chongqing-science Proof Proof of Set Membership, Containment, or Structural Property
1. Given sets $A = \{ 1,2,3 \} , B = \{ 2,3 \}$, then
A. $\mathrm { A } = \mathrm { B }$
B. $\mathrm { A } \cap \mathrm { B } = \varnothing$
C. $A \subset B$
D. $B \subset A$
1. Given sets $A = \{ 1,2,3 \} , B = \{ 2,3 \}$, then\\
A. $\mathrm { A } = \mathrm { B }$\\
B. $\mathrm { A } \cap \mathrm { B } = \varnothing$\\
C. $A \subset B$\\
D. $B \subset A$