病毒甲通过呼吸道感染动物乙后，可引起乙的B淋巴细胞破裂，T淋巴细胞功能丧失，导致其患肿瘤病，病患动物更易被其他病原体感染，给新生的乙个体接种甲疫苗可预防该肿瘤病。回答列问题：
（1）感染病毒甲后，患病的乙更易被其他病原体感染的原因是（）。
（2）新生的乙个体接种甲疫苗后，甲疫苗作为（）可诱导B淋巴细胞增殖、分化成（）和记忆细胞。记忆细胞在机体被病毒甲感染时能够（），从而引起预防该肿瘤病的作用。
（3）免疫细胞行使免疫功能时，会涉及到胞吞和胞吐这两种物质跨膜运输方式，这两种方式的共同点有（）（答出两点即可）。
参考答案：
（1）感染后B细胞、T细胞破坏，特异性免疫功能丧失（下降）
（2）抗原；浆细胞；迅速增殖分化，大量分泌抗体
（3）需要ATP供能；依赖细胞膜的流动性
| 阅读下面短文并回答问题。（请注意问题后的字数要求） | ||
of addressing envelopes, licking stamps and trips to the mail box. [2] Of all the methods for developing relationships on the Internet, e-mail is the most common-and perhaps the most powerful. Although friendship may indeed begin in chat rooms, instant messages, blogs or other environments, these relationships almost always expand into e-mail as a way to deepen the communication. It is a more private, more reliable, less messy way to talk. Even when other online tools improve greatly by becoming more effectively visual and auditory (听觉的)-as in video tele-conferencing-e-mail will not disappear. Many people will prefer it because it is a non-visual and non-auditory form of communication. After all, we don't see people rushing out to buy video equipment to add it to their telephone, even though that technology has been available for some time. [3]E-mail is not just an electronic mail sent via the internet. It creates a psychological space in which pairs of people-or groups of people-communicate with each other. It creates a situation and boundary in which human relationships can unfold. | ||
| 1. What is the main idea of the text? (within 10 words) ______________________________________________________________________________________ 2. Which sentence in the text can be replaced by the following one? People like e-mail better because it enables them to communicate even without seeing or listening to each other. ______________________________________________________________________________________ 3. Please fill in the blank in Paragraph l with proper words or phrases to complete the sentence. (within 8 words) ______________________________________________________________________________________ 4. Please list three other ways of communication. (within 15 words) ①___________ ②___________ ③___________ 5. Translate the underlined sentence in Paragraph 3 into Chinese. ______________________________________________________________________________________ |
