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一血友病病人与正常女性结婚，他们所生儿子患血友病的几率为
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交际法的优点包括
交际法认为，学会一种语言只要掌握它的语言形式和使用规则，不需要学会具体运用。
西门子S7-200 PLC 的模拟量输入地址的分配是按＿＿＿＿＿＿字节来分配的。
Water is the _1_ of life.Clean water is indispensable to sustain life. Water is the best friend of mankind throughout history. People use water for transportation, energy _2_, and cleaning. Water is also a wisdom _3_. Many philosophies of life in Chinese civilization come from water. The proverb, “No fish _4_ if water is too clear”, tells us don’t be too strict with others. The proverb,“To silence the people is more harmful than _5_ a river,”warns that serious harm could occur if the public was not allowed to express its opinions. The proverb, “Great _6_ is like water”, encourages people to nourish all things as water does, try their best to help others without seeking fame or profit, and to value human virtues such as endurance and modesty. The proverb, “All the people within the four seas are brothers”, shows the inclusive and broad mind of the Chinese and their _7_, love and friendship towards other human beings. The proverb, “When drinking water, one must not forget its source”, teaches people never to forget their origins and to always be grateful. Water delivers profound _8_.However, water sometimes turns to become the enemy of mankind. There are always people who are suffering from floods, _9_, and tsunami. Water is the “Apple of Discord”. As a _10_ resource, and one of the resources of vital strategic importance, it is destined to be a source of contention among the nations. Finally and reluctantly, I can’t deny that water is a sick patient, too. Look at these alarming pictures! Shall we go on turning a deaf ear to its tears and cries？Definitely NO! Let’s save Water，For you, for me, for all the living creatures and our mother Earth!
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