题目

       There are many ways to find a job. Local stores often have areas where people can put small signs telling what kind of service they need or can provide. Such services include caring for children or cleaning houses.        Or, job searchers can look in the newspaper. Local newspapers have employment announcements placed by companies seeking workers.        Another popular tool for finding jobs is the Internet. For example, people in four hundred and fifty cities around the world can use the Craigslist Web site to buy objects, meet people or find a job. Craigslist says t三个完全相同的杯中装有同样多的水，把质量相同的铁块、铝球和铜块分别放在三只水杯中，水都没有溢出，那么水面最高的是 [　　] A．放铜块的杯子B．放铝球的杯子 C．放铁块的杯子D．无法确定