题目

 — His father didn’t go to work today, did he?                 — ______.        A. No, he didn’t  B.Yes,he didn’t      C. No, he did   D. Yes, he was 答案：A人体从食物中吸收的固醇，肯定与体内的哪项活动无关（　　） A、促进新陈代谢B、维持细胞渗透压C、维持第二性征D、合成细胞的膜