资料：Human resource professionals act as mediators between an organization's management and its workers. This requires wearing many hats It's an HR administrator's job to make sure that employees are working in a safe environment that disputes are settled， and that benefits are understood and administered properly. At the same time， HR is charged with recruiting new employees who will not only fit in personally and professionally but also help the company achieve its business goals. They also represent management when negotiating for benefits with companies administering these benefits and when implementing companywide policies that will ultimately lower costs or boost profits. The needs of HR cover a wide range of tasks and，therefore， require individuals who are good with people in addition to being organized， analytical， business-minded， and heroic multitaskers.
All companies need some kind of HR support The Bureau of Labor Statistics（BLS） expects jobs in HR to grow faster than average for all occupations through 2012. Opportunities will increase as a result of a growing economy as well as a need to replace workers transferring to other occupations or retiring. BLS expects particularly strong demand for training and development and employment， recruitment， and placement specialists， with management， consulting， and employment services firms offering the greatest number of opportunities， thanks to a trend toward outsourcing personnel functions.
You can get the inside edge for a career in HR by strengthening your understanding of business strategy and planning and by specializing in a specific industry. A great way to get started in the field is with practice， look for an internship or an HR assistant job if you're in school or just out. Many HR professionals work their way up. As you develop an understanding of the various career tracks and master the basic skills within the function， you'll be in a great position to rise up the ladder.
What does “wearing many hats” in paragraph l， line l-2 most probably mean?
本题问的是“在第1自然段中，1-2行中的“wearing many hats”（“戴着许多顶帽子”）最有可能代表着什么意思？”。A选项“顺畅而巧妙地行事”；B选项“承担很多责任”；C选项“面临许多选择”；D选项“要注意衣物”。根据主题句和上下文可知，人力资源的工作涵盖了许多方面，因此B选项“承担多项职责”正确。
下列关于公司的表述，正确的是（）
以下各项列举了我国常见气象灾害与其发生地区的对应关系，其中正确的一项是（）
根据电视收视率调査，看体育节目的观众中青年人比中老年人要多。
由此可推断出（）
—种海洋蜗牛产生的毒素含有多种蛋白，把其中的一种给老鼠注射后，会使有两星期大或更小的老鼠陷入睡眠状态，而使大一点的老鼠躲藏起来。当老鼠受到突然的严重威胁时，非常小的那些老鼠的反应是呆住，而较大的那些老鼠会逃跑。
以上陈述的事实最有力地支持了以下哪项假说？（）
疾病控制中心对某校髙中三个年级的学生进行抽样做视力状况调查，抽样的方法为分层抽样（按比例抽样），若高中一、二、三年级学生人数分别为626、703、780，样本容量为84，则应从离二年级抽样的学生人数为多少？（）
