大学四六级英语大全

Israeli researchers said they had identified a naturally produced compound that may explain why only some smokers get lung cancer.Researchers found th...

China’s central authorities have outlined a series of new guidelines on improving the country’s market economic mechanism. These measures ...

No antibiotics have been proved to be 100% effective in treating SARS so far. The only effective way to get rid of it is by ourselves. It likes a prol...

For all the fevered work being done, however, science is still far away from the Brave New World vision of engineering a perfect human—or even a...

The English language is spoken or read by the largest number of people in the world, for historical, political, and economic reasons; but it may also ...

New global estimates, based on improved data, show about 40 million people worldwide are living with HIV/AIDS, including an estimated 2.5 million chil...

More cotton-padded tents are badly in need in Zhangye city in northwestern Gansu province, which was hit by twin tremors Saturday night, as most of th...

When we talk about intelligence, we do not mean the ability to get good scores on certain kinds of tests or even the ability to do well in school. By ...

We use both words and gestures to express our feelings, but the problem is that these words and gestures can be understood in different ways.It is tru...

The market investigation is indispensable to sales promotion. They are as closely related as the lips and teeth, so to speak. What you produce is for ...