（12分）向绝热恒容密闭容器中通入SO2和NO2，在一定条件下使反应
SO2(g)＋NO2(g)
（1）点a-c段，速率变化的主要原因是 ，点c后速率变化的主要原因是 。
（2）c点是否已经达到平衡状态 （填“是”、“否”或“不一定”）
（3）反应物浓度：a点 b点（填“<”、“=”或“>”）
（4）反应物的总能量 生成物的总能量（填“<”、“=”或“>”）
（5）△t1＝△t2时，SO2物质的量的变化量：a～b段 b～c段（填“<”、“=”或“>”）
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婚俗对人口发展的影响，正确的是[ ]
A．初婚年龄大，人口的出生率低
B．初婚年龄小，人口的自然增长率低
C．婚姻关系不稳定，则人口的出生率高
D．离婚率高，则人口的出生率高
一风湿性心脏瓣膜病患者，心率80次／分，心律不规整，肝肿大肋下3.0cm，下肢轻度水肿，优先选用哪一种药物治疗（）。
A.毛花苷C0.8mg，静脉注射
B.呋塞米20mg，静脉注射
C.高流量吸氧
D.硝普钠25mg，静脉滴注
E.地高辛0.25mg，每日1次口服
能同时被4和9整除的最小两位数是______，最小三位数是______．
健全的公司法人治理结构体现在( )。
A．规范的股权结构
B．有效的股东大会制度
C．董事会权力的合理界定与约束
D．相关利益者的共同治理
John H. Johnson was born in a black family in Arkansas City in 1981. His father died in an accident when John was six. He was reaching the high school age, but his hometown offered no high school for blacks.
Fortunately he had a strong—willed caring mother. John remembered that his mother told him many times, “Son, you can be anything you want really to be if you just believe.” She told him not to depend on others, including his mother. “You have to learn success” she said. “All the people who work hard don’t succeed, but the only people who do succeed are those who work hard.”
These words, came from a woman with less than a third grade education. She also knew that believing and hard work don’t mean everything. So she worked hard as a cook for two years to save enough to take her son, who was then 15, to Chicago.
Chicago in 1933 was not the promised land that black southerners were looking for. John’s mother and stepfather could not find work. But here John could go to school, and here he learned the power of words--as an editor of the newspaper and yearbook at Du Sable High School. His wish was to publish a magazine for blacks.
While others discouraged him, John’s mother offered him more words to live by “Nothing beats a failure but a try.” She also let him pawn（典当） her furniture to get the $ 500 he needed to start the Negro magazine.
It is natural that difficulties and failures followed john closely until he become very successful. He always keeps his mother’s words in mind:” Son, failure is not in your vocabulary!” Now John H. Johnson is one of the 400 richest people in America--worth $150 million.
小题1: What does the story mainly want to show us?
A．The key to success for blacks.
B．The mental support John’s mother gave him.
C．The importance of a good education.
D．How John H. Johnson became successful.小题2:Why did John’s mother decide to move to Chicago?
A．Because his father died when John was very young.
B．Because life was too hard for them to stay on in their hometown.
C．Because John needed more education badly.
D．Because there were no schools for Negroes in their hometown.小题3:Which of the following statements is TRUE according to the passage?
A．John’s mother didn’t believe in or depend on others.
B．John’s mother believed one would succeed without working hard.
C．John’s mother thought one could be whatever one wanted to be.
D．John’s mother thought no one could succeed without working hard.小题4:What does the underlined sentence “Nothing beats a failure but a try.” in Passage 5 mean?
A．No failure can be beaten unless you try.
B．If you try, you would succeed.
C．A try is always followed by a failure.
D．A failure is difficult to beat, even if you try.