材料:中华人民共和国中央人民政府政务院第43次会议(1950年7月28日)批准了《专科学校暂行规程》。规程规定专科学校的任务是:根据《中国人民政治协商会议共同纲领》,进行革命的政治及思想教育,树立正确的观点和方法,发扬为人民服务的思想,适应国家建设的急需,进行教学工作,培养通晓基本理论并能实际运用的专业技术人才,普及科学和技术的知识。专科学校的修业年限为2至3年,修业期满,成绩合格,发给毕业证书。专科学校的课程设置,要根据国家建设需要及理论与实际一致的原则,学校各课目的教学计划及教学大纲,应报教育部备案。
| 选项 | 事实 | 解释 |
| A | 冰融化成水 | 分子间间隔变大 |
| B | 用乙烯合成聚乙烯塑料 | 分子不断运动 |
| C | 氯化钠溶液具有导电性 | 溶液中有自由移动的粒子 |
| D | 一氧化碳可以做燃料 | 一氧化碳分子有可燃性 |
且
在
上既是奇函数又是增函数,则
的图象是( )
B .
C .
D .
,
,
,
是虚数单位,若
是实数,则
( )
B .
C .
D .
Everybody makes decisions in daily life. They can be as important as what you will do in the future or as simple as what you will eat for breakfast. Any decision could be the turning point of your life.
I made an important decision when I was in Junior 3.
Before I made that decision I wasn't a good student. I didn't listen to my parents or teachers, and my grades became poor. Then came the high school entrance exam.
At the turning point of my life, my mom wanted to have a conversation with me. I felt impatient but when I looked at her eyes, I felt I couldn't refuse. Instead of asking me to study hard, to my surprise, Mom just asked what I wanted to do in the future. Without thinking too much, I just said I would like to study hard.
Mom smiled and asked again, "I asked: what do you WANT to do?"
I had never seriously thought about the question before. So, I kept silent.
"Whether you want to go on studying or enter the society," she went on, "it is your own decision. It should be made by yourself, not anyone else, including me." After saying that, she had tears in her eyes.
For the first time in my life I was asked to make my own decision. I sat in my chair and thought about my life, my future and what kind of person I wanted to become.
It took me what seemed to be ages to make the biggest decision so far in my life—I wanted to be a man who makes a difference in the world. To achieve that, I needed to study hard.
The path to my future became clear to me. I didn't act rebelliously (叛逆地) any more. With passion (激情) in my heart, I studied hard.
Now, I'm 17 and I'm in one of the best schools in my city, in one of the best classes at the school and I am one of the best students in the class.
Thanks to that decision, I have become what I am today.
(1)求证:不论k取何实数,该方程总有实数根.
(2)若等腰△ABC的一边长为2,另两边长恰好是方程的两个根,求△ABC的周长.
①忧国忧民,道济天下的爱国情怀 ②勤于钻研,自强不息的奋进品格
③恪尽职守,服务人民的担当精神 ④甘于奉献,不计得失的高尚情操

是平原,以东是高原。
材料一 50年代,在资本主义世界中,美国无论在工业生产、出口贸易、黄金外汇储备各方面所占的比重都显著下降,而西欧六国(法、西德、意、荷、比、卢)所占的比重则大大上升。50年代中期以后,阿登纳说:“如果我们欧洲人不想在起了根本变化的世界上走下坡路的话……欧洲的联合是绝对必要的。没有政治上的一致,欧洲各国人民将沦为超级大国的附庸……”(1955年西欧六国召开会议决定建立一个共同市场和逐步协调它们的社会政策……1966年7月,六国正式成立欧洲共同体)
材料二
1970年 | 出口贸易 | 黄金外汇储备 | 国民生产总值 |
欧共体 | 885 | 270.3 | 4 863 |
美国 | 426 | 117.0 | 9 742 |
单位 | 亿美元 | 亿美元 | 亿美元 |
1970年 | 美 | 日 | 西德 | 法国 | 资本主义世界 |
工业总产值 | 37.8 | 9.45 | 10.1 | 6.5 | 100% |
出口贸易 | 15.2 | 6.9 | 12.2 | 6.4 | 100% |
黄金外汇储备 | 15.5 | 5.2 | 14.6 | 5.3 | 100% |
材料三 进入70年代,西欧六国和日本不可避免导致美国同盟国政治关系的变化,表现在西欧六国和日本外交上的独立自主倾向日益发展……美国再也不能像战后初期和50年代那样,在西方阵营颐指气使,发号施令。——以上材料均摘自何春超主编的《国际关系史》