题目

HIV直接破坏人体的什么结构（ ） A．神经细胞 B．淋巴细胞 C．血细胞 D．呼吸器官 答案：解：HIV是一种逆转录病毒，主要攻击和破坏的靶细胞为T淋巴细胞，随着T淋巴细胞的大量死亡，导致人体免疫力降低，病人大多死于其他病原微生物的感染或恶性肿瘤． 故选：B．(补全对话) A．She's six years old． 　　B．She's a doctor． 　　C．I'm glad you enjoyed it． 　　D．Who are they? 　　E．How old is she? 　　F．What's that? 　　G．He's an engineer． 　　A：This was a really wonderful dinner，Ann．　　 　　B：1 ndline　 Would you like some more coffee，Joe?　　 　　A：No，thanks．2 　　 　　B：A photograph．　　 　　A：That's a nice picture．3 　　 　　B：Well，that's Laura，my daughter．And that's her husband，Jack．4 　　A：The little girl must be your granddaughter．　　 　　B：Yes．That's Rose．5 　　A：What a lovely family!