决策树的分析程序包括：①剪枝决策；②计算期望值；③绘制树形图。排序正确的是( )。

When I was looking for a Christmas present for my daughter in a toy store, a nicely dressed little girl, with some money in her little hand, was looking at some beautiful dolls. When she saw a doll she liked, she would ask her father if she had enough money. He usually said yes.
At the same time, a boy, with old and small clothes, was looking at some video games. He, too, had money in his hand, but it looked no more than five dollars. Each time he picked up one of the video games and looked at his father, he shook his head.
The little girl had chosen her doll, a very beautiful one. However, she noticed the boy and his father. She saw the boy give up a video game with disappointment and walk to another corner of the store.
The little girl put her doll back to the shelf and ran over to the video game. After she talked to her father, she paid for the video game and whispered(耳语) to the shop assistant.
So the boy got the video game that he wanted for free—he was told it was a prize from the store. He smiled happily, although he felt it was so incredible. The girl saw all this happen. She smiled, too.
When I walked out of the store to my car, I heard the father ask his daughter why she had done that. I would never forget their short talk. " Daddy, didn’t Grandma want me to buy something that would make me happy"
He said, "Of course, she did. "
"Well, I just did!" With that, the little girl started skipping towards their car happily.

What does the sentence "Well, I just did!" mean

A．I just did something for the boy and he would be happy.
B．I just bought a nice doll for myself and I would be happy.
C．I just bought a present for Grandma and she would be happy.
D．I just did something for the boy and it would make me happy.

下列病证属于郁证的有（）

A.梅核气

B.脏躁

C.喉痹

D.痫证

E.癫证

熄灯仪式的变迁：熄灯就是关掉电灯，但熄灯仪式不是简单的关掉电灯。

材料一：80年前的熄灯仪式 1931年10月21日，全美国熄灯一分钟哀悼一位闻名世界的伟大发明家。

（1）材料一中，全美国熄灯哀悼的发明家是谁？为什么人们以这样的方式悼念他？他的众多发明是什么时代的典型代表？（4分）

材料二：现在的熄灯仪式  从2007年开始， 世界自然基金会为应对 全球气候变化提出一项倡议“地球一小时”，希望在每年3月最后一个 星期六20：30-21：30 熄灯一小时，来表明对应对 气候变化行动的支持。2011年有134个国家和地区参与到活动中。

（2）熄灯仪式的变迁，反映了人类正在面临着哪一道难解而又须解的题？解这道题需要人类树立怎样一种意识？（4分）

材料三：“地球一小时”2011提出了两大改变：①地球一小时的核心主题不再仅仅是气候变化，而是更广泛的环境保护行动；②除了在3月26日晚上20:30—21:30熄灯一小时外，“地球一小时”活动还号召大家为保护环境做出一个行动改变。

（3）距离2012年3月26日有一个多月左右的时间，说出自己在这一天中，愿意为保护环境做出的一个行动改变（环保承诺）。（温馨提示：可以从低碳家庭、低碳校园、低碳出行、低碳消费等角度作出承诺）（2分）

乘车运送时，必须按运输管理人员安排乘坐专列，并且两人（）车厢乘坐，乘车期间要用手扶好药箱，精力集中。

A.分开

B.同一

C.一起

D.都行

交通特性的研究包括（）的交通特性研究。

A.交通环境

B.车辆

C.道路

D.人