英语考研

Many people believe the glare from snow causes snowblindnenss. Yet, dark glasses or not , they find themselves suffering from headaches and watering eyes,and even snowblindness,when exposed to several...

On Thursday afternoon Mrs. Carke, dressed for going out, took her handbag with her money and her key in it, pulled the door behind her to lock it and went to the over 60s Club. She always went there o...

Water problems in the future will become nore intense and more complex. Our increasing population will tremendously increase urban wastes,primarily sewage. On the other hand, increasing demands for wa...

One of the qualities that most people admire in others is the willingness to admit one's mistakes. It is extremely hard sometimes to say a simple thing like "I was wrong about that," and it ...

Flying over a desert area in an airplane, two scientists looked down with trained eyes at trees and bushes. After an hour's flight one of the scientists wrote in his book, 'Look here for probable meta...

Trees should only be pruned when there is a good and clear reason for doing so and , fortunately,the number of such reasons is small. Pruning involves the cutting away of obergrown and unwanted branch...

In the United States, it is not customary to telephone somenone very early in the morning. If you telephone him early in the day, while he is shaving or having breakfast, the time of the call shows th...

The accuracy of cientific observations and calculations is always at the mercy of the scientist’s timekeeping methods. For this reason,scientists are interested in devices that give promise of m...

Liberia, the oldest independent Negro state in West A frica, has been struggling for survial ever since its foundation in 1822.Progress has been hampered by constant hostility between the American Neg...

　Accreditation is a system for setting national standards of quality in education. The United States is unique in the would because its accreditation system is not administered by the government , b...