题目

如图所示，合成氨反应：N2（g）＋3H2（g）2NH3（g） △H＜0。在某一时间段t0～t6中反应速率与反应过程的曲线图。试回答下 列问题： ⑴合成氨反应已达平衡状态的时间段为：                                         。 ⑵t1～t2时间段是改变的           条件使平衡向       方向移动；t4～t5时间段是改变的       条件使平衡向      方向移动。 ⑶在此过程中，氨的百分含量最高的一段时间是             。 "How should I give my children pocket money?" is one of the most common also common questions. 　　 Giving pocket money is an excellent way to develop children’s independence. Children should receive pocket money as their small share of the family wealth, and they should share in doing the housework as well. 　　 Here are some ideas to help you use pocket money to develop your children’s independence. 　　 Give pocket money regularly. Like adults, children should have a payday every week or two. 　　 Link pocket money with ages and needs. Provide spending guidelines; don’t be afraid to let them know what you expect them to buy, and what not to. A child in preschool and lower primary school is sure to spend money on candies and other such things. But older children can be expected to buy their own lunches or bus tickets. 　　 Teach kids to set their goals. Encouraging children to save money for big things like bikes can help them learn about planning ahead. 　　 When given wisely, pocket money is an excellent way to develop children’s independence. But at some time, perhaps when a child turns fifteen, it needs to be reduced or eliminated in order to encourage the child to get a part-time job and begin to earn his own pocket money. 64. What is the author’s attitude towards giving children pocket money? A. Positive.　　 B. Indifferent(中立的).　 C. Negative.　　 D. Worried. 65. According to the author, giving pocket money to children ______. A. is an excellent way to encourage them to study hard B. makes them learn to be more independent C. makes their parents worry less about themD. is a good way to make them do a lot of housework 66. When giving pocket money to children, parents should ______. A. give them lots of money so that they can share the family wealth B. give it to them at regular times C. give every child the same amount D. let them spend it as they please 67. What do we learn from the passage?A. Only children who help do the housework should get pocket money. B. Parents usually give more money to younger children. C. Parents should let children spend money on their own when they have money D. Children should find part-time jobs when they get old enough.