题目

A beautiful and very successful actress was the star of a new musical show. Her home was in the country, but she didn’t want to have to go back there every night. So she rented an expensive flat in the centre of the city, bought some beautiful furniture and hired a man to paint the rooms in new colours. It was very difficult to get tickets for her show, because everybody wanted to see it, so she decided to give the painter two of the best seats. She hoped that this would make him work better and more willingly for her. He took the tickets without saying anything, and she heard no mor人体的特异性免疫包括细胞免疫和体液免疫，下列属于细胞免疫功能的是A.裂解被病毒感染的细胞B.合成抗体抑制病菌繁殖C.分泌淋巴因子以增强免疫效应D.形成抗毒素使细菌外毒素丧失毒性