The Microscopic Technique Each advance in microscopic technique has provided scientists with new perspectives on the function of living organisms and the nature of matter itself. The invention of the
新东方优美背诵短文50篇 Unit49:Sleep 49 Sleep Sleet is part of a person’s daily activity cycle. There are several different stages of sleep, and they too occur in cycles. If you are an average sleeper, your slee
Telecommuting Telecommuting -- substituting the computer for the trip to the job--has been hailed as a solution to all kinds of problems related to office work. For workers it promises freedom from th
Muscles and Human Body It is in the joints of the human body that movements of the bones take place.The movement itself is caused by the pull of sheets and cords of very tough tissue called muscle. Mu
新东方优美背诵短文50篇 Unit41:American Black Bears 41.American black bears American black bears appear in a variety of colors despite their name. In the eastern part of their range, most of these brown, red, or
Pottery Ancient people made clay pottery because they needed it for their survival. They used the pots they made for cooking, storing food, and carrying things from place to place. Pottery was so impo
新东方优美背诵短文50篇 Unit42:Coal-fired power plants 42.Coal-fired power plants The invention of the incandescent light bulb by Thomas A. Edison in 1879 created a demand for a cheap, readily available fuel wit
Jane Brown has been married for 12 years. She has three children, and lives in a suburb outside Columbias Higher. When her youngest child reached school age, Jane decided to go back to work. She thoug
The Definition of "Price" Prices determine how resources are to be used. They are also the means by which products and services that are in limited supply are rationed among buyers. The price system o
Giving Life Meaning Have you thought about what you want people to say about you after you’re gone? Can you hear the voice saying, “He was a great man.” Or “She really will be missed.” What else do th
Clear Your Mental Space Think about the last time you felt a negative emotion---like stress, anger, or frustration. What was going through your mind as you were going through that negativity? Was your
Changing Roles of Public Education One of the most important social developments that helped to make possible a shift in thinking about the role of public education was the effect of the baby boom of
The process of dying imbues fewer and fewer choices available to us. Even in dying, however, we still have choices concerning how we handle what is happening to us. The following account deals with th
The Beginning of Drama There are many theories about the beginning of drama in ancient Greece. The one most widely accepted today is based on the assumption that drama evolved from ritual. The argumen
Love your life However mean your life is,meet it and live it ;do not shun it and call it hard names.It is not so bad as you are.It looks poorest when you are richest.The fault-finder will find faults
Andrew Carnegie Andrew Carnegie, known as the King of Steel, built the steel industry in the United States, and, in the process, became one of the wealthiest men in America. His success resulted in pa
Lighthouses The first navigational lights in the New World were probably lanterns hung at harbor entrances. The first lighthouse was put up by the Massachusetts Bay Colony in 1716 on Little Brewster I
Friends A true friend is someone who reaches for your hand and touches your heart. There's always going to be people that hurt you,so what you have to do is keep on trusting and just be more careful a
