题目

以下关于艾滋病(AIDS)的叙述，错误的是（ ）①AIDS患者出现病症的直接原因是其他病原体感染②HIV攻击人体免疫系统，特别是B淋巴细胞③HIV侵入人体后存在潜伏期，原因是潜伏期HIV复制能力较弱④感染HIV的人称为AIDS患者，应尽快治疗⑤目前还没有根治AIDS的特效药A. ②③⑤ B. ①④⑤ C. ②③④ D. ①②③ 答案：【答案】C【解析】试题艾滋病是由HIV病毒引起的，HIV病毒侵入人体后于T淋巴细胞结合，破坏T淋巴细胞，使免疫调节受到抑制并逐渐使人体的免疫系统瘫痪，最终使人无法抵抗其他病毒、病菌的入侵，或发生恶性肿瘤而死亡。HIV侵入人体后存在潜伏期，原因是T,B淋巴细胞对HIV有免疫能力和杀死能力，会22、Do you like chocolate? Maybe most people do．A box of it can be a great gift．Buy one for a friend and give it as a surprise．See how happy that person gets. Say you just got a box of chocolate．Which piece do you pick first? A man has studied people’s choices．He says they tell something about the person．Did you choose a round piece? You are a person who likes to party．Did you choose an oval （椭圆形的） shape? You are a person who likes to make things．Picking a square shape shows something else．The person is honest and truthful．You can depend on him or her. What kind of chocolate do you pick? Maybe you like milk chocolate．This shows you have warm feelings about the past．Dark chocolate means something else．A person who chooses it looks toward the future．What about white chocolate? Would you choose it? If so, you may find it hard to make up your mind．Some people like chocolate with nuts （果仁）．These are people who like to help others. Do you believe these ideas? Can candy tell all these things? It doesn’t really matter．There is one sure thing about eaters of chocolate．They eat it because they like it. 1．This passage mainly tells us ______. A．why people like chocolate B．almost everyone likes chocolate C．about different kinds of chocolate D．different choices may show different characters 2．Picking a round shape of chocolate shows that a person ______. A．likes singing, dancing and drinking B．likes to do something for others C．is good at making things D．can be depended on 3．If you enjoy eating milk chocolate, you may ______. A．look forward to the future B．like to think of the past C．enjoy parties and fun  D．have trouble making decisions 4．From this passage we can see that a helpful man may choose chocolate ______. A．in oval shape                                B．in square shape C．with nuts                                   D．with coffee 5．The last paragraph suggests that the writer ______. A．believes all the information about chocolate B．does not believe the information about candy C．is trying to get you to believe false information D．doesn’t think it important whether you believe the ideas