要求用纳税能力来决定税收总额在社会成员之间分配的比例。A．受益原则 B．纳税能力原则

（16分）A、B、C、D、E、F、G是七种短周期主族元素，它们的原子序数依次增大，其中在元素周期表中A的原子半径最小，B和F、C和G分别是同一主族元素，含有D元素的物质焰色反应为黄色，G元素的最外层电子数是次外层电子数的3/4。又知B元素的最外层电子数是内层电子数的2倍，D、E、G三者的最高价氧化物的水化物两两皆能反应。请回答：

（1）A与C形成的原子个数比为1：1的化合物的电子式为             ，该物质含

              键；它与GC₂反应的化学方程式为                         

（2）D、E两者氧化物的水化物反应的离子方程式为                              ；

（3）B、F的最高价氧化物         （填化学式）的沸点高，理由是              

（4）A、C、G间可以形成甲、乙两种负一价双原子阴离子，甲有18个电子，乙有10个电子，则甲与乙反应的离子方程式为                                    。

Preparing for the Next Job Market

The latest spike in the unemployment rate is being felt across the board ?in 98 percent of metropolitan areas, in high-wage and low-wage jobs, among young and old, women and men, but especially men．

This landscape means that young Americans who are trying to plan their futures right now have some hard choices．Do they go to college and take on debt without hope of getting a job? And what about high school students? Do they have any chance of securing a job without a college degree? Perhaps the education system needs to react to this rapidly moving economic crisis．

In our current economic collapse, the connection between education and employment could not be more different than it was during the Depression．Education must now hold center stage, not because of an enemy abroad but because of the global economy．The jobs of the future will demand levels of education, particularly skills in mathematics, technology and science, which exceed those now taught in high school．

A healthy society should strive for full employment．In our times, that goal cannot be realized, or even approximated by creating jobs for the unskilled．The long-term prospect for economic recovery depends on the extent to which we improve our educational system．And this is where America is now at its weakest．##

Our high schools produce graduates who do not write well enough, have limited reasoning skills and are unable to use the tools of mathematics．Their command of science is far inferior to that of their counterparts in other nations．And all too many young people drop out．We may still have the best university system, but it benefits only a minority．

We will need more engineers, scientists and service providers, particularly in the health professions, with a quality of education that cannot be obtained in the current system．Radical change, not reform, is called for．

What should be done? First, high school should be cut short and end when students are 16．Second, a new generation of two-year college programs tied to a wide range of specific skills that the economy needs should be created．Third, access to four-year colleges should be expanded, giving more Americans the chance to acquire the deep learning that makes breakthroughs in technology possible．Fourth, we need to recruit more public school teachers and train them better, particularly in physics, chemistry, biology and mathematics, so that our children can be prepared to compete．

小题1:Nowadays, students graduating from high school____．

A．write well enough

B．have limitless reasoning skills

C．can't use the tools of mathematics

D．command science as much as their counterparts in other nations小题2:What should we do to improve the quality of education?

A．Students shouldn't study in high school until 16．

B．We should create a new generation of two-year college programs tied to a wide range of specific skills the economy needs．

C．We should limit access to four-year colleges．

D．We ought to recruit more private school teachers and train them better．小题3:What does the word "collapse" in the third paragraph mean?

A．success

B．failure

C．development

D．booming小题4:Which of the following is NOT true according to the passage?

A．Young Americans planning their futures have difficult choices．

B．Education must hold center stage due to the global economy．

C．The best university system benefits a majority．

D．A health society should struggle for full employment．

临床资料：女，50岁，常规体检。

超声综合描述：肝右叶胆囊前壁外可见0．8cm×0．6cm稍低回声区，边界清晰，胆囊前壁受其推挤向内凹陷，CDFI：其内未见明显血流信号。见下列彩图。

超声提示：（）

A.肝腺瘤

B.脂肪肝脂肪分布不均

C.肝硬化增生结节

D.肝结节病

局部激素适用年龄限制与安全性的关系是（）。

A.正相关

B.负相关

C.无相关性

D.视情况而定

《武器装备管理检查考暂行规定》明确装备的安全设施要求有哪些？