题目

如图为人体免疫过程图解，其中A﹣D表示不同的细胞，据图回答下列有关问题【1】图中A为_____细胞，该细胞参与的免疫过程为_____免疫．【2】图中B代表的是_____细胞，它在抗原的刺激下_____为C细胞和D细胞，D细胞产生的_____与抗原相结合．【3】若侵入人体的细菌是一种发热激活物，通过一系列反应会引起人体发热．病人在发烧时会感觉肌肉酸痛，原因是_____【4】当相同抗原再次侵入人体时，_____（括号填图中字母，横线填文字）参与免疫反应，其过程1、 If you ____ my advice last week, you ____ your failure now. A. took ; wouldn’t cry over          B. had taken ; wouldn’t have cried over C. had taken ; aren’t crying over D. had taken ; wouldn’t be crying over