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Java是Java语言的编译器。基本语法是：Javac[选项] 【7】 。
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Children are a relatively modem invention. Until a few hundred years ago they look like adult, wearing grown-up clothes and grown-up expressions, performing grown-up tasks. Children did not exist because the family as we know it had not evolved. Children today not only exist; they have taken over in no place more than in America, and at no time more than now. It is always Kids Country here. Our civilization is child-centered, child-obsessed. A kid’s body is our physical ideal. In Kids Country we do not permit middle-aged. Thirty is promoted over 50, but 30 knows that soon his time to be overtaken will come. We are the first society in which parents expect to learn from their children. Such a topsy-turvy situation has come to abort at least in part because, unlike the rest of the world, ours is an immigrant society, and for immigrants the only hope is in the kids. In the Old Country, that is, Europe, hope was in the father, and how much wealth he could accumulate and pass along to his children. In the growth pattern of America and its ever- expanding frontier, the young man was ever advised to GO WEST; the father was ever inheriting from his son. Kids Country may be the inevitable result. Kids Country is not at all bad. America is the greatest country in the world to grow up in because it is Kids Country. We not only wear kids clothes and eat kids food; we dream kids dreams and make them come tree. It was, after all, a boys’ game to go to the moon. If in the old days children did not exist, it seems equally true today that adults, as a class, have begun to disappear, condemning all of us to remain boys and girls forever, jogging and doing push-ups against eternity. Going to the moon is an example of ______ .
Look at your watch for just one minute. During that time, 174 babies were born in the world. Maybe you think that isn’t many. During the next hour, over 10440 more babies will be born in the world. So it goes on, hour after hour. In one day, people have to find food for over 250 000 mouths more. Just think how many more there will be in one year! What will happen in one hundred years The population (人口) problem may be the greatest one of the world today. The world’s population is growing faster and faster. Two thousand (千) years ago, there were only 200 million (百万) people in the world. Four hundred years ago, the number was over 500 mil- lion. But in the year 1900, the world’s population was about 1700 million. In 1970, this number was over 3 600 million. In 1990, the number was over 5 billion (十亿). People say by the year 2010, it may be seven billion. That means in about 600 years, there will be only standing room on the earth. Population in Africa (非洲) and Asia (亚洲) is too large.
已知单位产品售价为P，年固定成本为CF，单位变动成本为CV，单位产品销售税金为了，则以产销量表示的盈亏平衡点BEP(Q)=( )。
Once there was a king. He lived in a beautiful city. His garden was full (41) lovely flowers. The king (42) silver (银的) bells on each flower. Then everyone heard the bells (43) and looked at the flowers. The garden was very big. (44) the gardener (园丁) didn’t know how big (45) A small bird lived in one of the trees. It (46) the nightingale (夜莺). It sang so beautifully. People told the king how much they liked the city, (47) when they heard the little bird, they all said, "Nothing is as (48) as the nightingale." And they talked (49) the bird for a long time. Men wrote books about the city and they always wrote (50) things about the nightingale.
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