下列哪项属于非机动车（）①自行车、残疾人专用车②人力车、畜力车③三轮汽车轻便摩托车

某市政府办公楼总建筑面积6.5万平方米。现该市政府决定将办公室大楼物业管理服务外包，并决定通过公开招标选聘物业服务企业。

根据上述资料，回答下列问题：

该市政府办公大楼的招标单位和中标单位应当在中标通知书发出之日起()日内，按照招标文件和中标人的投标文件订立书面合同。

A.10 

B.15 

C.30 

D.60

【化学——选修5：有机化学基础】(15分) 已知工业上用含氢量最高的烃A为起始原料来合成PMA等高分子。流程如下：

试回答下列问题：

（1）F中所含官能团的名称为__________。

（2）上述①②③反应中原子利用率由高到低的顺序是________________。

（3）反应③可看作________反应(填反应类型)。

（4）写出反应②的方程式_______________________。

（5）写出合成有机玻璃的反应的方程式_______________________。

I decided to go back to school in the fall of 2008 after not being happy with my current job and financial status. I obtained my Associate’s Degree in May 2002 in Commercial Arts. After graduation, I had trouble obtaining a job in that field. For years, I was going from one job to another feeling unfilled, and I was not satisfied with the instability.

I decided to go back to school for either International Business or Psychology. I weighed the pros and cons of both professions and Psychology won. I like helping my friends and family, when they go through hard situations in their life by giving them sound advice and being honest with them. Also, I was interested in “the mind”.

I was searching for online schools because my work schedule at my current job would not allow me to attend a regular class. I was nervous about starting online classes because I heard mixed stories from other friends who were taking online classes. I decided to do it anyway to experience something different. I wanted to find an online school that was affordable and reputable. Through my search, I discovered Walden University, which is specially for working adults who want to obtain a bachelor’s degree or higher. The process of getting accepted was easy, which included writing an essay on why I wanted to attend their school, transferring my previous credits, etc.

I am currently enrolled in the Bachelors program for psychology, and I am paying for college via financial-aid loans and grants. This experience has been interesting yet trying as sometimes it was difficult to balance work, school and home life. I learned a lot about psychology and myself. For example, I like writing about current events, relationships and traveling. I thought my English composition was ordinary, but after taking a few classes at Walden University, I improved my English composition and it made me feel confident enough to start writing professionally so I became a freelance (自由撰稿) writer. Currently, I am only three classes away from obtaining my Bachelor’s Degree in Psychology! It was one of the best decisions I made in my life.

小题1:What did the author study originally when he was in college?

A．Psychology

B．Commercial Arts

C．International Business

D．English Composition小题2:What do we know about the author from Paragraph 2?

A．He decided to study International Business at first.

B．He wanted to study two majors.

C．He liked Psychology better.

D．He chose his major with the help of his friends.小题3:Why was the author nervous about starting online classes?

A．Because he heard some negative remarks about it.

B．Because he was worried that he didn’t have enough time to study.

C．Because he feared he would fail the entrance exam.

D．Because he was afraid that he didn’t have enough money.小题4:Which of the following best describes the author’s learning experience?

A．Dull and challenging.

B．Interesting and easy.

C．Interesting and challenging.

D．Dull and easy小题5:According to the passage, the author _________.

A．was not able to find a full-time job

B．is most interested in writing

C．pays for his schooling with the help of his family

D．is satisfied with his achievements.

在电弧焊中，能够较容易焊接1mm以下极薄金属板的焊接方法有（）。

A．手弧焊

B．埋弧焊

C．熔化极气体保护焊

D．等离子弧焊

1961年，国务院首批颁布全国重点文物保护单位，（）、（）、（）、（）名列其中，被誉为“中国四大名园”。