题目

已知铝在空气中会生成一层致密的氧化膜（Al2O3  ），该氧化膜可与稀盐酸发生反应：  Al2O3+6HCl===2AlCl3+3H2O。实验小组将未打磨的铝片和稀盐酸放入密闭容器中，用传 感器探究反应过程中温度和压强的变化，结果如右图。下列说法不正确的是 （    ）      A．反应过程中有热量放出 B．0~50 s，发生稀盐酸与 Al2O3 的反应 C．50 s 时，溶液中溶质为 AlCl3 D．100 s~140 s，压强减小是因为温度降低根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中的两项为多途选项。 Teenagers learn by taking on more and more responsibility gradually. For many parents, this involves giving their children a limited amount of control over financial decisions.  If you give your teen some pocket money regularly, take the time to teach them how to manage their money.   1  Consider providing extra income opportunities to help them learn that money is something you earn, not something you can get for nothing. 2   Discuss with them such issues as what the car can be used for, who is responsible for gas and maintenance, and who can actually drive the car. Show them how auto insurance works. Get them involved with your day-to-day personal finance decisions, such as grocery shopping.   3  Show them how to comparison shop, pointing out how much money you save through comparing prices and using coupons. Let them sit with you while you pay the bills, so they can see how much all the monthly expenses add up to. Encourage teens to save their money toward a major purchase. Besides, you can offer to reward them for their savings. 4  5  You might even consider showing them your bills when you pay them. Too often, young adults who get their first credit card consider it as free money and find themselves in debt very quickly. Make them understand that the $50 they charge today costs a lot more if they don’t pay it off quickly. A．Another effective tool is to get them involved in the car buying process. B．It’s easier to spend money than to earn it. C．Finally, it is important to show teens how credit cards work D．Establish an agreement on what the pocket money covers. E. This is a great way to teach them the relationship between building a savings account and the positive rewards that follow. F. Without money, you can’t do anything. G. Have them help you with the grocery list.