题目

Although it's great to spend vacations seeing the world with family, friends, or a lover, traveling alone can also be completely incredible. A solo adventure has the potential to be life-changing. Here are some reasons you should travel alone at least once.If you enjoy meeting new friends, here's your chance; you will likely find some when traveling alone, Since you won't be focused on talking to anyone you know, you'll be more likely to strike up conversations with strangers. Meeting people from different backgrounds opens our minds, expands our world, and can inspire us a lot. You may meet s右图为人体特异性免疫的部分过程，下列相关叙述中正确的是 A．给未感染过禽流感病毒的人注射灭活的H5N1禽流感病毒，可以诱导 M 细胞迅速增殖分化 B．E 细胞接触被抗原入侵的靶细胞，导致靶细胞裂解 C．当同一种抗原再次进入人体时，产生的浆细胞均来自记忆细胞 D．图中具有识别功能的细胞有吞噬细胞、T细胞、B细胞、M细胞