简述2到3岁儿童欣赏教学活动特点。

专项规划是指导该领域的发展以及审批核准该领域重大项目和安排重大投资的( )。

A．关键环节

B．重要成分

C．重要依据

D．主要体现

下列操作不符合无菌原则的是

A．术者肘部接触有菌区后带袖套

B．手术区无菌巾浸湿后立即加盖无菌巾

C．术者面对面更换位置

D．术者双手保持在无菌台面以上

E．胃肠切开前垫好纱垫

第三部分：阅读理解（共20小题，每小题2分，满分40分）

阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

My teenage son Karl became withdrawn after his father died. As a single parent, I tried to do my best to talk to him. But the more I tried, the more he pulled away. When his report card arrived during his junior year, it said that he had been absent 95 times from classes and had six falling grades for the year. At this rate he would never graduate. I sent him to the school adviser, and I even begged him. Nothing worked.

One night I felt so powerless that I got down on my knees and pleaded for help. “Please God, I can’t do anything more for my son.  I’m at the end of my rope. I’m giving the whole thing up to you.”

I was at work when I got a phone call. A man introduced himself as the headmaster. “I want to talk to you about Karl’s absences.” Before he could say another word, I choked up and all my disappointment and sadness over Karl came pouring out into the ears of this stranger. “I love my son but I just don’t know what to do. I’ve tried everything to get Karl to go back to school and nothing has worked. It’s out of my hands. “For a moment there was silence on the other end of the line. The headmaster seriously said, “Thank you for your time”, and hung up.

Karl’s next report card showed a marked improvement in his grades. Finally, he even made the honor roll. In his fourth year, I attended a parent-teacher meeting with Karl. I noticed that his teachers were astonished at the way he had turned himself around. On our way home, he said, “Mum, remember that call from the headmaster last year?” I nodded. “That was me. I thought I’d play a joke but when I heard what you said, it really hit me how much I was hurting you. That’s when I knew I had to make you proud.”

56. By saying “Karl became withdrawn”, the author means that the boy changed entirely and ________.

A. preferred to stay alone at home             B. lost interest in his studies

C. refused to talk to others                        D. began to dislike his mother

57. There was silence on the other end of the line because ________ .

A. the speaker was too moved to say anything to the mother

B. the speaker waited for the mother to finish speaking

C. the speaker didn’t want the mother to recognize his voice

D. the speaker was unable to interrupt the mother

58. The underlined sentence “…he even made the honor roll” means that “________ ”.

A. he was even on the list to be praised at the parent-teacher meeting

B. he was even on the list of students who made progress in grades

C. he was even on the list of students who had turned themselves around

D. he was even on the list of the best students at school

59. What is the main idea of this passage?

A. Children in single-parent families often have mental problems.

B. Mother’s love plays an important role in teenagers’ life.

C. Being understood by parents is very important to teenagers.

D. School education doesn’t work without full support from parents.

在外加直流电源激励下的非零初始状态的一阶电路中，各处的电压和电流变化的时间常数都是一样的。

酸雨