[多选题]执行switch语句y获得值为3的是______

A、switch(1){case 1: y=3;case 2: y=2; break;
B、switch(2){case 3: y=3;break;case 4: y=3; break;}
C、switch(3){case 1: y=1; case 2: y=2;default: y=3;}
D、switch(4){case 4: y=1;case 3: y=2; case 2: y=3;}

参考答案： C@#@D

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