题目

下列各组粒子中只具有还原性的是（  ） A．F－、SO2、K             B． Na、Zn、I－ C．Fe3+、NO3－、SO42－       D．  Fe2+  、O2 、H2O2 答案：BThe lifelong benefits of teaching children good money habits make it well worth the effort. Children who are not taught these lessons pay the consequences for a life time. Some parents don't teach children about money because they think they shouldn't talk about money, with children, and they don't have the time, or they think they don't have enough money. Parents should take the time to teach children about money regardless of their income and should start when children are young. Most people have strong feelings and opinions about money, based on childhood experiences and the values and beliefs of their families. Most often, these experiences, values, and beliefs are different for each parent. It is vital（至关重要的）for the healthy development of children that parents talk about these feelings and opinions and establish a consistent approach to teaching children about money. Here are some guidelines parents can keep in mind as they begin the financial socialization of their children. Guide and advise rather than direct and dictate how children's money should be used. Encourage and praise children rather than criticize and rebuke（指责）actions taken. Allow children to learn by mistakes and by successes. Be consistent while taking children's differences into account. Include all family members in money management discussions, decision making, and activities as appropriate for their age. Explain to children what they can and cannot do and the consequences of violating the limits. As children get older increasingly include them in discussions of limits and consequences. Expect all family members to perform unpaid, routine household chores（家务）based on their abilities. Express your desire to have things you can't afford. Children need to know that parents say “no” to themselves, too. 81. List one of the reasons why some parents don't teach children about money. (No more than 10 words) (3 marks) 82. What are most people's strong feelings and opinions about money based on? (No more than 11 words) (3 marks) 83. What should parents let all family members take part in besides activities as appropriate for their age? (No more than 7 words) (2 marks) 84. What does the text mainly tell us? (No more than 7 words) (2 marks)