题目

—What did you do yesterday?—Ihome and did my homework． A . stayed at B . stayed in C . stay at 答案：A组成人体的八大系统中，与新陈代谢有直接关系的四大系统是（　　）A、运动、循环、消化和呼吸B、神经、泌尿、呼吸和消化C、循环、消化、呼吸和泌尿D、呼吸、泌尿和内分泌