题目

今有大、小盛米桶，5个大桶加上1个小桶，可盛3斛米；1个大桶加上5个小桶，可盛2斛米，求大、小桶各盛多少米（斛：量器名，古时用）？ 若设大桶盛x斛米，小桶盛y斛米，则可列方程组为___________． 答案：【解析】根据两个条件列出两个二元一次方程，联立起来就是所求的方程组． The murderer was brought in, with his hands ________ behind his back． [　　] A．being tied B．having tied C．to be tied D．tied