对大多数雨量器而言，（）是造成固体降水量少测的最主要的环境因素。A．遮挡物 B．蒸发

2011年9月19日，国务院 * * 温 * * 主持召开国务院常务会议，研究部署进一步做好保障性安居工程建设和管理工作时提出，坚持因地制宜，科学编制建设规划，统筹安排年度建设任务，不搞“一刀切”。材料蕴涵的唯物辩证法道理是

A．要坚持一切从实际出发

B．社会存在的变化决定社会意识的变化

C．事物是相对运动和绝对静止的统一

D．要坚持具体问题具体分析

阅读理解。

     It was graduation day at the university where I work and a beautiful day quite unlike the first

graduation I attended as a young professor. On that cold day years ago, as we watched the students

walking into the hall, one of my colleagues turned to me and said, "Graduation will be one of the happiest

and one of the saddest time of your life." At my inquiry, he answered, "Because the students you have

gotten to know have to leave."

     As years went by, my previous confusion about my colleague's words no longer existed. When I

came across naughty students, I have had to rethink why I chose to be a teacher. It obviously isn't the

money. Once a former computer science student of mine called me, asking me if I wanted to have a

change. He was working at Nintendo Corporation. His salary was higher than my current one, though

I have more education and have worked for over a decade. With my programming skills, he said he

could get me hired. I thanked him, but declined his kind offer.

     A few days before this current graduation, while working on final grades, I found a note a s student

had slipped in with her homework. She thanked me for being her teacher and said the things she had

learned in my class - not about math, but about life - would be things she would remember long after

the math skills had faded away.  As I finished reading, I remembered why I had become a teacher.

      Now, on this sunny graduation day, as I again observed the sea of blue hats and gowns, I did so

with renewed dedication and a deeper sense of satisfaction - I will always be grateful that I am a teacher.

1. Hearing his colleague's description for the first time, how did the author feel?

A. He quit agreed with his colleague.

B. He was very puzzled

C. He thought it very funny.

D. He was very sad.

2. What does the underlined part in the last paragraph refer to?

A. University colleagues.

B. Life memories.

C. Decorations in the hall.

D. Graduates' clothes.

3. The author wrote this passage to         .

A. express his devotion to being a teacher

B. compare two different graduation ceremonies

C. talk about the meaning of graduation

D. give advice on how to be a good teacher

（1）图所示的电阻箱接入电路的电阻是         Ω。

（2）图所示的弹簧测力计的示数是    N。

备用通风机定期维护内容有哪些？

正常妊娠期血液系统的生理变化，下列说法正确的是（）.

A.血液呈高凝状态

B.血容量增加，至足月妊娠时达高峰

C.白细胞增加，主要是淋巴细胞增多

D.血液稀释，血细胞比容降至0.35～0.38

E.由于血液稀释，血浆纤维蛋白原略低于非孕期