问题
完形填空
| 完形填空。 | |||
| Please Help Ladies and gentlemen, thank you very much for coming to this concert. I hope you have enjoyed the music. The purpose of this concert is to 1 money for children in Africa. Every day 2 children in Africa die because they have diseases or have not enough 3 . There are two main reasons. First, there are no jobs for the children's parents, so they have no money to buy food or 4 . Second, the governments in many African countries do not have the money to take care of poor people. Most African counties are poor. The land is not good for 5 food and the weather is also bad for farming. The organization we are trying to help. The Feed Africa Fund, 6 a lot of money every year on food for poor people in Africa. The money comes 7 people like you kind, generous people who do not want to see children die from hunger. Just one dollar can buy enough rice or corn to 8 a family of four for three days. How much do you spend on food every day? Ten dollars? Twenty dollars? I am sure you can spend a little 9 on your own food so that you have a few dollars for the Feed Africa Fund. Ladies and gentlemen, we will now take a 10 . Please be generous. Thank you. | |||
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答案
1-5 BCABA 6-10 CBACB
过量NaOH溶液，产生有刺激性气味的气体且有沉淀生成；
家用铝锅不能经常用热碱水洗涤去污，原因是（用离子方程式表示） 。
，则其单体的结构简式为 。