患者女性，24岁。因左上智齿颊侧错位，需局麻下拔除。如果在注射麻醉后，拔除注射针时，

人造卫星绕地球做匀速圆周运动时处于完全失重状态，物体对支持面没有压力，所以在这种环境中已无法用天平称量物体的质量。针对这种环境，某兴趣小组通过查资料获知，：弹簧振子做简谐运动的周期为（其中m时振子的质量，k时弹簧的劲度系数）。他们设计了一种装置来间接测量物体的质量，如图所示，A是带夹子的金属块，金属块和夹子的总质量为m₀，B是待测质量的物体（可以被A上的夹子固定），弹簧的劲度系数k未知，当他们有一块秒表。

（1）请你简要地写出测量待测物体质量的方法，测量的物理量用字母表示

①______________________________；

②______________________________。

（2）用所测物理量和已知物理量求待测物体质量的计算式为m＝____

Questions 26-30I am always a little puzzled when I hear people complain about the difficulties of finding a good job. Young people in their 20s express dissatisfaction that all the good jobs have been taken by those in their 40s. People in their 40s, trapped in the middle groups of the workforce, complain about waiting for their elders to make room for them at the top. Older employees worry about being forced out of the job market prematurely by younger people willing to work at entry-level wages. It is not a pretty picture.But I do not buy it. In my view, differences between generations are not a problem but an opportunity-if you remember to apply some basic principles of self-marketing. Most of us learned from Marketing 101 textbooks that there are four phases in the life cycle of a product or brand. The names may differ, but essentially the four phases are Introduction, Growth, Maturity and Decline. As a manager of high-profile athletes for more than 30 years, I know that these four phases certainly apply to the career and marketability of an athlete.An athlete’s introduction or start-up phase is when he or she starts competing, does well and captures the attention of people in the sport. Introduction turns into the growth phase when the athlete goes from being a promising performer to an established star. That’s when everybody wants a piece of the athlete’s time and he must stay focused on his primary talent and not get distracted by side issues.For an athlete, the toughest thing about the mature phase may simply be recognizing that he or she is in it. If you’re marketing a bar of soap it is easy to tell if the product is mature. It is there in the stagnant or shrinking sales figures. It is different with athletes. Not only do they think the growth phase will never end, but they often deny that there is any decrease in their athletic skills or marketability, no matter what the numbers say.The decline phase for an athlete may sound harsh, but it doesn’t have to be if he or she thinks of it as a reflective phase. In this phase an athlete can have tremendous future as a legendary figure who functions as an ambassador for his or her sport. If you substitute "employee" for "athlete" in these examples, these four phases apply to any individual’s career.I genuinely believe that whenever people face a career crisis, a big reason is because they are "out of phase." I have always been a tremendous advocate of recruiting older workers. With the massive downsizing of corporate America, there are tens of thousands of talented men and women over the age of 50 who feel shut out of the work-place. To me, these people are a gold mine-not because they are available but rather because they possess the qualities that employees in the introduction and growth phases lack, namely wisdom and experience. And since many of them received generous early-retirement packages, money is not their sole motivation. In other words, they are affordable.If I were marketing myself in the mature phase, I’d focus on these qualities. Wisdom, experience and affordability make up a potent package. But you can not do that unless you first recognize and fully appreciate the phase you are in.

The author thinks highly of older employees because _______.

A．they are good at marketing themselves

B．they are obedient and can be easily controlled

C．they possess better qualities in the growth phase

D．they have more wisdom, experience and affordability

“最大限度激发社会活力、最大限度增加和谐因素、最大限度减少不和谐因素”，胡 * * * * 在省部级主要领导干部社会管理及其创新专题研讨班上，提出了加强和创新社会管理的总要求。下列选项中符合总要求的是

①实现基本公共服务均等化，让人民共享经济社会发展成果

②实现城乡社会一体化，消除城乡差距

③加强和改进社会管理，协调各方面利益关系

④以人为本，扩大公民的政治权利

A．①②

B．③④

C．①④

D．①③

用于肝经风热，目赤翳障，惊痫夜啼之证，宜选用（）

A.薄荷

B.牛蒡子

C.蔓荆子

D.蝉蜕

E.葛根

LD光盘中采用的纠错方式是（）。

A.CIRC

B.双CIRC

C.MPEG

D.没有