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7.脑缺血缺氧多长时间即可导致神经细胞的死亡？A.2分钟

A. 4分钟
B. 6分钟
C. 8分钟
D. 10分钟

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8.在缺血多久后脑缺血的病理组织学变化才较明显？

A. 12小时
B. 10小时
C. 8小时
D. 6小时
E. 4小时

9.下列哪项不是海绵状脑病（朊蛋白病）的病变？

A. 部分病例大脑可无明显萎缩
B. 神经毡出现空泡
C. 神经细胞缺失
D. 反应性胶质化
E. 炎反应

下列哪项不是流行性乙型脑炎的病变特点？

A. 小胶质细胞增生
B. 神经细胞变性、坏死
C. 镂空的筛网状软化灶形成
D. 早期大量中性粒细胞浸润，形成血管套
E. 病变以大脑皮质、基底核及视丘最为严重

[音频]Listen and fill in the gaps. All answers are in lower case.(01)Anthony Sheldon, a (02)at a top British College, has (03)that computers will replace teachers. Intelligent computers, he says, will become the teachers. Teachers will be(04) to today’s classroom (05). They will be responsible for (06) , set up the computers, and help children who need (07). However, they will no longer (08)students.AI computers will now (09)on knowledge at least as well as teachers do. They offer many (10) over humans. The software will (11) the best possible education, and it will be (12)to students 24 hours a day for as long as they want it. Students will be able to work at their own pace on courses that they have chosen. AI will be able to understand what is (13)for them and (14) information at the right learning level. AI computers will also respond to the voices and faces of students and will even understand how a student is feeling. Sheldon (15) that this will allow them to provide the(16) once thought only possible through human (17). In fact, it will completely change (18)as we know it. And it will be here within 10 years.