屈肘动作的完成是由于[ ] A．肱二头肌舒张，肱三头肌收缩 B．肱二头肌收缩，肱

Before the summer of 2000, the 54-year-old John Haughom could accomplish just about anything at work. "I could move mountains if I put my mind to it. " he says of those days. But that summer Haughom found he couldn’t move them any more. On the phone with his wife one morning, Haughom broke down. A couple of days later Haughom checked himself in for a three-week stay at the Professional Renewal Center, an in-patient clinic 30 miles outside Kansas City that helps him deal with stress.

Haughom is far from alone. A host of new studies and plenty of anecdotal evidence show that stress in the workplace is skyrocketing. Whatever the cause, stress levels are at record highs. The statistics are startling. According to a new study by the federal government’s National Institute for Occupational Safety and Health, more than half the working people in the U. S. view job stress as a major problem in their lives. This year the European Community officially dubbed stress the second-biggest occupational-health problem facing the continent.

Ten years ago experts warned that stress was out of control, in part because of a shaky economy. What’s notable about today’s wave of stressed-out workers is that it rises all the way to the top. Lack of control is generally considered one of the biggest job stressors, so it used to be thought that middle managers carried the brunt: sandwiched between the top and the bottom, they end up with little authority. Powerful chief executive officers (CEOs) were seen as the least threatened by stress. But in today’s tough economy, top executives don’t have as much control as they used to. "Stress is just part of the job, fortunately or unfortunately, stress is part of our character building, " Lebenthal says. "But I think I don’t need any more character building. What I need is a vacation. "

But if you think that going on vacation is hard—and studies show that 85% of corporate executives don’t use all the time off they’re entitled to. Being able to handle stress is perhaps the most basic of job expectations. So among the corporate elite, succumbing to it is considered a shameful weakness. Stress has become the last affliction that people won’t dare admit to. Most senior executives who are undergoing treatment for stress-and even many who aren’t—refused to talk on the record about the topic. "Nothing good can come out of having your name in a story like this, " one CEO said through his therapist.

What is the European Community’s attitude toward stress().

A. Stress is a disease that people should try to handle.

B. Stress has great influence on working people’s lives.

C. Stress is one of the most serious occupational diseases.

D. Stress is a major problem all the people face.

已知将浓盐酸滴入高锰酸钾溶液中，产生黄绿色气体，而溶液的紫红色褪去．现有一个氧化还原反应的体系中共有3Cl、Cl₂、H₂SO₄、H₂O、3MnO₄、MnSO₄、3₂SO₄七种物质．

（1）该反应中，化合价升高的反应物是______．

（2）写出一个包含上述七种物质的氧化还原反应方程式：______．

（3）上述反应中，1mol氧化剂在反应中得到______mol电子．

（4）如图：将浓盐酸滴入高锰酸钾固体中，制取适量黄绿色气体的简易装置，请回答下列有关问题：装置C、D的作用分别是：C______；D______．

（多）某浓盐酸的密度l.1d8g•cm^-3，该盐酸的物质的量浓度C₁=13.13mol•L^-1，溶质HCl的质量分数为W₁=4中%．则质量分数W₂=2中%的盐酸其物质的量浓度C₂______（填大于、等于或小于）6.多6多mol•L^-1．

西周末年，昏庸的周幽王上演了一场“烽火戏诸侯”的闹剧。诸侯率兵前往护卫周王是遵守了                                                                 （  ）

A．封建制的法规

B．禅让制的规则

C．世袭制的传统

D．分封制的义务

下列划线字的解释有误的一组是（   ）（2分）

A．一丝不苟（马马虎虎）濯（洗）

B．头晕目眩（眼睛昏花）小心翼翼（鸟的翅膀）

C．可望不可即（接触、靠近）获益匪浅（非，不）

D．慧心未泯（灭，丧失）繁弦急管（指管乐器）

VSP5柱上真空自动配电开关的操作机构只能为自动。（）