问题 填空题

用吹脱捕集气相色谱法测定水中苯系物时,水样应加()调节PH值()保存。

答案

参考答案:盐酸;<2

阅读理解

阅读理解。

     It was around 9 pm. Before heading to dinner in Jayanagar T Block, I was told by my wife that the

rickshaw (人力车) fare would be 40 rupees. Anyhow I had 150 rupees in my pocket. My wife said that if

the drivers of rickshaws see out-of-town travelers, they'll scam (欺诈) them one way or another.

     At a crowded stop, a young girl extended her hand through the iron bars on the side of our rickshaw to

ask for some money. After we refused, or rickshaw driver started his remarks on giving.

      "Giving is good. Every human should give. But we should know how to give." The rickshaw driver

continued,"Most of these kids are trained by some guy who keeps all the money. It's run like a business. All

of us should give, but this is just not the right place to give."

     He talked a bit more before we arrived. I asked about the fare."39 rupees," he said.

     Now, most people who get cheated end up saying,"Well, you know, I don't mind paying extra if it is a

good guy but I refuse to be cheated." I gave him 40 rupees, and he gave me a 1 rupee coin in return (Most

folks would just round up). So I put the coin in my wallet, and took out a 100 rupee note.

     "Can you do me a favor?""Of course, sir," he replied politely."We were talking about art of giving. You

seem to know how and where to give. Can you put the 100 rupees to good use somewhere?"

     "Give me your address and I'll make sure I get a receipt (收据) of where I gave," He replied without

hesitation. I didn't understand him at first. Then I smiled and told him,"I trust you."

     So on the way back, instead of taking a bus to my place, I walked for the whole distance since I didn't

have enough money. It was almost 1 a.m and I had to wake up at 6 a.m the next day. But I still walked.

1. Why did the author's wife tell him the rickshaw fare?

A. To remind him to go by rickshaw.

B. To warn him no to be cheated.

C. To tell him the convenience of taking a rickshaw.

D. To save some money for them.

2. Why did the rickshaw driver refuse when the young girl begged for money?

A. He knew money should not be given to her.

B. He had no spare money to give her.

C. He always cared for himself more than others.

D. He was afraid that he was attacked by her.

3. From the talk, we can learn that the rickshaw driver was _____.

A. well-educated

B. generous

C. selfish

D. honest

4. It can be inferred from the passage that _____.

A. the author gave the driver 100 rupees for his kindness

B. the author walked home to save money

C. the driver would give away the 100 rupees instead of the author

D. the dinner which the author had was not free of charge

5. What would be the best title for the passage?

A. To give or not

B. Take a rickshaw

C. Refuse to be cheated

D. One rupee in change

单项选择题

阅读下面的文字,完成文后问题。

与伦琴发现的X射线为基础的放射线医学不同,基于贝可勒尔的放射性核素发展起来的核医学,在很大程度上依靠示踪原理,即利用放射性核素参加体内生物活动同时发出射线的特点,通过探测射线反映这些生物活动过程及其特点

物质是第一性的。大千世界中的近4万种物质,究其本来,都不过是由氢、氮、碳等一些简单的物质元素以不同数量和方式的组合所形成的。人体自身,也不过是三十余种简单元素的复杂组合而已。生命,也只是这些元素相互关系动态变化的一个过程。因此,如果能够观察这些元素或元素关系的变化,就无疑找到了从生命本来水平①探索生命奥秘的最佳途径。核医学的示踪原理,利用放射性元素或示踪剂与体内元素或由其组成的生物分子的理化性质相近,从而可以参加或“渗透”人体内生物活动的特性,通过射线达到了了解体内特定生物活动的目的,是当前唯一具备在活体元素水平②观测人体和生物过程潜力的技术。

分子水平③进行示踪对医学的贡献之一是提供独特的诊断信息。大量研究结果证实,人类大多数疾病在本质上都是从______、______、______逐渐发展到______,最后产生临床症状和体症的一种系列变化过程。目前临床上种种“早期诊断”往往只能检测到功能和形态的改变,通常是一旦确诊,疾病实际上已达到发展过程的晚期,这对进一步救治无疑是十分不利的。核医学通过示踪原理,利用不同标记分子来参加特定生物活动的不同过程,每每洞察秋毫,使不少疾病诊断提前到代谢甚至基因阶段,争取了宝贵的治疗时间。

结合上下文,给第三段画线处依次填写词语,正确的一项是()。

A.代谢异常 基因变化 结构形态失常 功能异常

B.基因变化 代谢异常 功能异常 结构形态失常

C.功能异常 结构形态失常 基因变化 代谢异常

D.功能异常 代谢异常 结构形态失常 基因变化