设数列{an}的前n项和为Sn，且Sn=2an-1（n∈N+）．（Ⅰ）求证数列{

化学推动了社会的进步，使我们的生活绚丽多彩。下列事实中，发生化学变化的是 （   ）

A．将石油进行分馏

B．用海水晒盐

C．用浓硫酸做气体干燥剂

D．用乙醇汽油作燃料驱动汽车

Have you ever been afraid to talk back when you were treated unfairly? Have you ever bought something just because the salesman talked you into it? Are you afraid to ask a boy (girl) for a date？

Many people are afraid to assert themselves (insist upon their own rights). Dr Robert Alberti, author of Stand Up, Speak Out, and Talk Back, thinks it’s because their self-esteem(自尊) is low. “Our whole set-up makes people doubt themselves,” says Alberti. “There’s always a 'superior' around — a parent, a teacher, a boss — who 'knows better’”.

But Alberti and other scientists are doing something to help people to assert themselves. They offer “assertiveness training” courses (AT). In the AT courses people learn that they have a right to be themselves. They learn to speak out and feel good about doing so. They learn to be aggressive(敢闯, 闯劲儿) without hurting other people.

In one way, learning to speak out is to overcome fear. A group taking an AT course will help the timid person to lose his fear. But AT uses an even stronger motive—the need to share. The timid person speaks out in the group because he wants to tell how he feels. AT says you can get to feel good about yourself. And once you do, you can learn to speak out.

小题1:In the passage, the writer talks about the problem that _______.

A．some people are too easy-going

B．some people are too timid

C．there are too many superiors around us

D．some people dare not stick up for their own rights小题2:The effect of our set-up on people is often to _______.

A．make them distrust their own judgment

B．make things more favorable for them

C．keep them from speaking out as much as their superiors do

D．help them to learn to speak up for their rights小题3:One thing AT doesn’t do is to _______.

A．use the need of people to share

B．show people they have the right to be themselves

C．help people to be aggressive at anytime even when others suffer

D．help people overcome fear

【背景材料】某市高新技术开发区有2幢科研楼和1幢综合楼，其设计方案对比项目如下。

A楼方案：结构方案为大柱网框架轻墙体系，采用预应力大跨度叠合楼板，墙体材料采用多孔砖及移动式可拆装式分室隔墙，窗户采用单框双玻璃钢塑窗，面积利用系数为0．93，单方造价为1438元／m²。

B楼方案：结构方案同A方案，墙体采用内浇外砌，窗户采用单框双玻璃空腹钢窗，面积利用系数为0．87，单方造价为1108元／m²。

C楼方案：结构方案采用砖混结构体系，采用多孔预应力板，墙体材料采用标准普通砖，窗户采用单玻璃空腹钢窗，面积利用系数为0．79，单方造价为1082元／m²。

方案各功能的权重及各方案的功能得分见表4-27。

试应用价值工程方法选择最优设计方案。

患癫病日久不愈，神志恍惚，善悲欲哭，心悸易惊，神倦体惰，食少纳呆，舌淡，苔薄白，脉细弱，宜辨证为（）

A.痰气郁结

B.心脾两虚

C.气郁

D.痰阻

E.脾虚

执行碰库的时间应该是（）

A.班前

B.中午

C.随时

D.下班前

E.入库后