题目内容
（请给出正确答案）
A.To calculate calories.
B.To get kids playing on the couch.
C.To encourage the kids.
D.To get kids taking exercise.
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更多“A.To calculate calories.B.To g…”相关的问题
How was the weight used？
A．To check the accuracy of scales.
B．To calculate the density of other metals.
C．To observe changes in the atmosphere.
D．To measure amounts of rainfall.
What should people do to calculate the amount of salt in a product？
A．To multiply the sodium content by one-and-a-half times.
B．To multiply the sodium content by two-and-a-half times.
C．To multiply the sodium content by three-and-a-half times.
D．To multiply the sodium content by four-and-a-half times.
How is the weight used？
A．To measure amounts of rainfall.
B．To check the accuracy of scales.
C．To observe changes in the atmosphere.
D．To calculate the density of other metals.
A．To measure amounts of rainfall.
B．To cheek the accuracy of scales.
C．To observe changes in the atmosphere.
D．To calculate the density of other metals.
根据上下文填入适当的内容完成译文
The high"energy density"of junk food-the amount of calories it contains in relation to its weight-throws the brain's appetite control system into confusion.as this is based on the size of a portion rather than its energy content.
______含有很高的“能量密度”，即食物重量和______的比例。垃圾食品往往使大脑的______陷入混乱，因为控制系统判断的标准是食物分量的大小______热量的高低。
They tried hard to establish enough schools for their children.The schools were not only to teach children how to read, write and calculate but also to train clergymen(牧师) .The first college, Harvard, was set up in Massachusetts in 1636.Soon after, the colonial government passed a law requiring every town of more than 40 families to have a school and school master.By the mid-eighteenth century several well-known colleges were founded, including Columbia in New York and Princeton in New Jersey.They were used to train young people.Education did not develop very fast in the South where big plantation(农场) owners did not want to build schools for the children of the poor workers and slaves.Children from rich families usually went to England for higher education.This was one of the reasons why the South developed more slowly than the North.
Colonial schools laid the foundation for American educational system in which all the American schools were left to the care of communities or local authority.Compulsory education has been carried out and primary and secondary education has been open to American children free of charge for many years.
21.Education in most Americans'eyes is().
A.quite necessary for social development and democracy
B.important only for the earliest settlers
C.good as they have many famous universities
D.the basis of working hard
22.Which of the following was not a task of school？ ()
A.To train clergymen.
B.To teach children how to read and write.
C.To teach children maths.
D.To send children to British universities.
23.The South America developed slowly because().
A.children in the South went to England for higher education
B.there were not many rich people in the South
C.not all rich children in the South had chances to go to school in England
D.education developed quite slowly in the South
24.American educational system was built().
A.on the basis of colonial educational system
B.after some famous colleges were founded
C.by churches as they hoped to train more clergymen
D.when many children from rich families went to England
25.Which of the following statements is true according to the passage？ ()
A.Princeton University was founded around 1750s.
B.Colombia University was built in 1636.
C.Harvard University was founded by the American government.
D.A law was passed by the American government that a school should be built in every town.
Calculate the solubility at 25℃ of CaCO3in a closed vessel containing a solution of pH 8.60.
Calculate the solubility of A2X3in pure water, assuming that neither kind of ion reacts with water. For A2X3,
