在能源应用领域利用各种技术、设备和工具，对创新要素和内容进行选择、优化和系统集成，可

从某一高度相隔1s先后释放两个相同的小球甲和乙，不计空气阻力，则它们下落的过程中，下列说法正确的是（　　）

A．两球的距离保持不变

B．两球的速度差保持不变

C．两球的加速度差越来越小

D．甲相对于乙向下作匀速直线运动

虚拟局域网是建立在什么之上的 ( )

A．局域网交换机

B．局域网

C．令牌总线网

D．共享介质网

I got married in 2008. My husband and I are very emotional and have loads of dreams in life. Now I want to share a hidden part of my life.

After one month of my marriage, I started working because I could not sit home. To accomplish our dreams, we are both working hard day and night in spite of belonging to a good family. Life is very strange. When any turn happens, one cannot know.

I started working because I was very ambitious. I used to wonder about people who worked to earn their bread but I never knew in my wildest dreams that I would be part of the crow who work to earn a livelihood.

I was blessed with a daughter in November, 2009. She was just three months and 15 days old when I rejoined my job. My husband supported me and my family supported me but I never wanted to work again because I belonged to a family where a mother should give her full attention to her child.

Keeping all the values aside that I learnt from my parents, I went back to work and will work till my last breath.

I missed my daughter every second. She has started recognizing and throwing expressions for likes and dislikes. I cannot share my feelings with anyone, as I do not want anyone to know that I am broken completely from inside.

My husband and my daughter are my greatest strength but I ignore them just to earn money and fulfill my dreams that I have.

If one day, my daughter complains to someone about her mom, please tell her that she is my reason for survival and happiness and she is the only one who brings smile to my face.

小题1:The author began to work after her marriage mainly because ____.

A．She expected to prevent herself from doing housework

B．She hoped to achieve her dream

C．She wanted to support her husband

D．She wanted to make her own bread小题2: After her daughter’s birth, the author thought ____ in the beginning.

A．she should work harder

B．she should continue her career as she used to

C．she should stop working and care for her child

D．she should become a more ambitious mother小题3:From the passage, we can know that the author’s daughter ____.

A．lives together with her mom now

B．hasn’t begun to learn to speak so far

C．always makes her mom heartbroken

D．has given much comfort to her mom小题4:The author wrote this passage in order to ____.

A．complain about her present life

B．show her love for her daughter

C．keep a diary of her daughter’s growth

D．present the hardships of a working mother小题5:What is the best title of this passage?

A．The secret of a working mother

B．A working family is continuing

C．A husband’s support for his wife’s career

D．The comparison between the family and career for a mother

什么是高温作业？有哪几种类型？

I would have accompanied you to the cinema yesterday, but I （） no time.

A. had had

B. could have had

C. might have had

D. had