题目

—He must be busy doing his homework right now.—I imagine____.A. that     B. to     C. so     D. it 答案：C 解析: I imagine so=I think so以下对人体结构的层次关系表述科学的是（ ）A.细胞→组织→器官→系统→人体B.细胞→器官→组织→人体→系统C.组织→细胞→器官→系统D.细胞→器官→组织→系统→人体