[判断题]高压线路不停电时，工作负责人应向全体人员说明线路上有电，并加强监护。
A.正确
B.错误

Wherever people have been, they have left waste behind, which can cause all sorts of problems. Waste often stinks, attracts vermin and creates eyesores. More seriously, it can release harmful chemicals into the soil and water when dumped, or into the air when burned. And then there are some really nasty forms of industrial waste, such as spent nuclear fuel, for which no universally accepted disposal methods’ have thus far been developed.
Yet many also see waste as an opportunity. Getting rid of it all has become a huge global business. Rich countries spend some $120 billion a year disposing of their municipal waste alone and another $150 billion on industrial waste. The amount of waste that countries produce tends to grow in tandem with their economies, and especially with the rate of urbanization. So waste firms see a rich future in places such as China, India and Brazil, which at present spend only about $5 billion a year collecting and treating their municipal wa
A. Rich countries might help poor countries to treat the waste
B. California’s “zero waste” program makes no environmental sense
C. More taxes are needed to collect and treat the waste efficiently
D. Governments’ policies on waste industry are largely incoherent

Who takes care of the elderly in the United States today Many people wrongly believe that when people reach old age, their families place them in nursing homes. They are left there in the hands of strangers for the rest of their lives. Their grown children visit them only occasionally, but more often, they do not have any regular visitors. The truth is that this idea is an unfortunate myth—a fictitious story. In fact, family members provide over 80 percent of the care that elderly people need.
Samuel H. Preston, a sociologist at the University of Pennsylvania, studied how the American family is changing. He reported that by the time the average American couple reaches 40 years of age, they have more parents than children. This statistic shows the change in life-styles and responsibilities of aging Americans. The average middle-aged couple can look forward to caring for elderly parents some time after their own children have grown up. Moreover, because people today l