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His parents sent him to private teachers. Alfred was a very good student. When he was seventeen, he left Russia for Paris to study chemistry for a year. Then he went to the United States. He studied in the United States for four years. Alfred studied very hard and by the time he was twenty, he was already a very skillful chemist. Alfred was very good at learning languages, too. He could speak Swedish, Russian, German, French and English. Later he returned to Russia. At that time, his father’s factory had some difficulties and it failed in the end. His family became very poor and most of the family members had to go back to Sweden in 1859. When he came back from Russia, Alfred began his own study in his father’s lab. He invented dynamite. That was his greatest achievement. He hoped that people could use it for mining and road building. Alfred became very rich for his invention. But Alfred’s main concern was never with making money. Although he was very rich, he led a simple life until his death. He didn’t care about being famous either. From his youth, Alfred was seldom happy and he never married. He came to care deeply about the whole of mankind. He was always good to the poor. His greatest wish was to see an end to wars, and peace between nations. Alfred Nobel died in Italy in 1896. According to his will, the Nobel Prize was founded. He left money to give prizes for outstanding work in physics, chemistry, physiology and medicine, literature, and peace. And now Alfred Nobel is known all over the world and he is remembered and respected long after his death. 4.Which of the following is NOT true about his invention of dynamite? Alfred Nobel was a great Swedish scientist and inventor. He was born in Stockholm on October 21,1833. When he was nine years old, he moved to Russia with his parents. His father had a mine there and made a lot of money.
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【简答题】母鸡采食高峰和喂料次数以及时间有很大关系。鸡全天都采食饲料,但相比较而言,早晨和傍晚的采食量稍多些。傍晚采食量占全天的()%,但清晨鸡的采食速度比其他时间快,采食频率可达每分钟()次。
【单选题】实际采食量减去因维持体重和生长所需的采食量是
A.
剩余采食量
B.
饲料转化率
C.
饲料利用率
D.
采食量
【多选题】sw06 在进出口业务中,非固定价格的规定方法主要有
A.
指规定作价的方式而具体价格留待以后确定
B.
暂定价
C.
部分固定价格,部分非固定价格
D.
支付一定的定金,于款后付
【单选题】猪采食行为的主要表现是( )。
A.
拱土觅食
B.
分顿采食
C.
咀嚼采食
D.
先饮水后采食
【多选题】动物采食量的估算方法有()
A.
对动物进行圈养,直接测算出采食量。
B.
根据动物种类的代谢量研究,计算现有动物采食总量。
C.
测定动物排出的粪便量,计算采食量。
D.
从植物体残留的被动物采食后的痕迹进行估计。
【简答题】采食经济(名词解释)
【判断题】阿里巴巴是典型的B2B电子商务网上交易平台。
A.
正确
B.
错误
【单选题】牛皮蝇蛆病的主要危害是( )。
A.
影响采食和生殖
B.
影响采食和引入病原
C.
影响采食和引起皮肤受损
D.
皮肤受损和产生变态反应
E.
影响生殖和产生变态反应
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【简答题】雏鸡采食行为(名词解释)
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