题目

下图是几种元素的原子结构示意图，请根据题目要求填写下列空白   (1) 属于金属元素的是        ，其原子结构特点为                      ， 在化学反应中易失去电子，形成            离子。 （2） 写出B单质在F单质中燃烧的符号表达式                          。I had made up my mind a long time ago that I would not give a homeless person money, because I could never be sure what that money would be used for. Instead, I decided, I would buy them a sandwich, a cold drink on a hot day, a cup of coffee, whatever I could manage.          I was out recently and saw a homeless man outside of a Starbucks. I decided I would buy this man lunch. I bought a sandwich and soda.          Just as I was leaving the store, two policemen were approaching the man. Obviously the shop owners had complained of his wandering and the police were there to draw him away from the storefronts. Just as they were about to wake him, I asked one of the officers if it was all right if I just gave the man something before he went. I was not sure why I asked the permission but the policeman said sure and I just left the bag in the man’s cart, got in my car and drove off.          As I was driving off I remember thinking “I hope people saw that”. Then I had to seriously ask myself why I hoped people had seen me give the man a sandwich from Starbucks. Was it because I wanted people to think, “She’s such a nice person!”? Why did I hope others had seen me do it? I continued to wonder this all evening.          The next morning, it came to me that I wanted people to have witnessed that small act of kindness not so that I would receive credit and praise but so that they might be inspired to do the same and in so doing that others still would witness their acts of kindness. Thus the whole spirit of pity and giving would be lasting. 1.The underlined word “Starbucks” in the second paragraph is the name of a _________. A. shop                        B. bookstore                        C. bank                        D. man 2.When the author saw the homeless man, he was __________. A. begging outside                                                   B. buying goods C. staying awake                                                       D. falling asleep 3. What’s the purpose of the passage? A. To show the author is great. B. To encourage people to help others. C. To introduce an experience that changed the author. D. To call on people not to give money to a homeless man. 4.The author can be best described as __________. A. bad-tempered                                         B. hard-working C. kind-hearted                                            D. self-confident