我们使用的电话分听筒和话筒两部分，听筒是将______信息转化为______信息

阅读理解。

     My grandfather never watched TV. He thought that people spent too much time watching it. Some of

his friends often talked about sports shows, the movies and plays. My grandfather said to himself, "They

never read any books or go out in the evening". So he didn't buy a TV.

     Two years ago my grandfather was 60 years old. He stopped working in the hospital. My father bought

him a TV. He began to watch all the news. He knows much more about the world now. And he reads more

books,too.

     Now, my grandfather will get very angry (生气) if you trouble (麻烦) when he is watching TV. I can't

know that one can change his idea when he is 60.

1. My grandfather didn't watch TV because ________.

A. he had no time to watch it

B. he thought it took (占) people much time to watch TV

C. he couldn't buy the TV set

D. he thought watching TV is bad for people's eyes

2. My grandfather ________ when he worked in the hospital.

A. went to mountains

B. played sports

C. read books

D. watched TV

3. My grandfather didn't work in the hospital ________.

A. after he was 60

B. before my father bought him a TV

C. when my father asked him not to work

D. after he liked watching the news

4. My grandfather is ________ now.

A. 58

B. 60

C. 62

D. 61

5. Which is the following sentence right?

A. The writer knows why his grandfather changed his idea.

B. My grandfather enjoys watching TV every day now.

C. My grandfather bought a TV at the age of 60.

D. The writer as well as his grandfather likes watching TV.

万卡特拉曼?莱马克里斯南、托马斯?施秦茨和阿达?尤纳斯三位科学家因“对核糖体的结构和功能的研究”而获得2009年的诺贝尔化学奖。核糖体在细胞中的工作，是根据DNA所含有的各种指令，合成不同酌蛋白质。如果细菌的核糖体功能得到抑制，那么细茵就无法存活。在医学上，目前许多抗生素通过阻滞细菌核糖体的功能而治愈多种疾病，但出现病原微生物对抗生素的‘抗性’新问题，进一步了解核糖体，有助于研制出疗效更好的抗生素。3名获奖者通过独立的研究和科学实验，使用了X射线结晶学的方法得到了核糖体的三维结构，绘制出3D模型。在原子水平上分析了由几十万个原子构成的核糖体的结构和功能，扫清了目前抗生素研究中的许多障碍，并弄清了一些细菌的抗药机制。如今已被应用于开发新的抗生素，直接挽救生命及减少人类的痛苦，也为科学探索提供了新工具。

结合材料，运用实践和认识关系的知识，说明三位科学家的科学实验过程。

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对于飞行人员，下列哪项是糖的代谢主要改变（）。

A.无氧酵解减弱

B.有氧氧化增强

C.糖原合成增强

D.酵解作用增强

E.糖异生作用增强

关于消化性溃疡的病理，以下哪项不正确（）

A.溃疡的直径一般小于2.5厘米

B.溃疡愈合一般需要4～8周

C.溃疡呈圆形或椭圆形

D.多发性溃疡不少见

E.溃疡的边缘不整齐

关于急性脑血管疾病的病因表述不正确的是（）

A.脑出血最常见的病因是高血压和动脉硬化

B.脑栓塞最常见的病因是风心病合并房颤的心源性栓子脱落

C.脑血栓形成最常见病因是动脉炎

D.蛛网膜下腔出血最常见病因是先天性颅内动脉瘤

E.短暂性脑缺血发作最常见病因是动脉粥样硬化