Once it was possible to define male and female roles easily by the division of labor. Men worked outside the home and earned the income to support their families， while women cooked the meals and to
Recent research has claimed that an excess of positive ions in the air can have an ill effect on people‘s physical or psychological health. What are positive ions? Well， the air is full of ions
In the past century Irish painting has changes from a British-influenced lyrical tradition to an art that evokes the ruggedness and roots of an Irish Celtic past. At the turn of the twentieth century
The moden world only recently reached the Yanomano, a native people of the Amazon basin. Sheltered by thick rainforest,the Yanomano lived a self-contained existence until gold was discovered in their
Since its foundation in 1954, the United Nations has written into its major covenants(契约) the need to establish minimum ages for marriage. But the custom of marriage is a highly sensitive cultural
As you all know, the United States is a country on wheels. Nearly eight million new cars are made each year; four households out of five own at least one car, and more than a quarter have two each. Ye
A scientific panel convened by the World Health Organization recommended guidelines on Friday for doctors conducting clinical studies of SARS patients. The panel urged doctors to apply the guidelines
We all know that the normal human daily cycle of activity is of some 7-8 hours’ sleep alternation with some 16-17 hours’wakefulness and that, broadly speaking, the sleep normally coincides with th
Look at the keyboard of any standard typewriter or computer. “Q,“ “W,“ “E,“ “R,“ “T“ and “Y“ are the first six letters. Who decided on this arrangement of the letters? And why?
With its common interest in lawbreaking but its immense range of subject matter and widely varying methods of treatment, the crime novel could make a legitimate claim to be regarded as a separate bran