题目

某兴趣小组活动中，同学们按下图装置对“可燃物燃烧的条件”进行探究。探究过程中，大家对磷燃烧产生的大量白烟是否危害人体健康提出疑问。 【查阅资料】白磷的着火点是40℃，红磷的着火点是240℃，……燃烧产物五氧化二磷是白色固体，会刺激人体呼吸道，可能与空气中水蒸气反应，生成有毒的偏磷酸（）。 【交流与讨论】白磷对人体健康有害，该实验装置必须改进。 【改进与实验】同学们按改进后的图2装置进行实验。 请你帮助他们将下Do you want to live with a strong sense of peacefulness, happiness, goodness and self-respect? The collection of happiness actions broadly categorized as “honor” help you create this life of good feelings. Here’s an example to show how honorable actions create happiness. Say a store clerk fails to charge us for an item. If we keep silent, and profit from the clerk’s mistake, we would drive home with a sense of sneaky (偷偷摸摸的) excitement. Later we might tell our family or friends about our good fortune. On the other hand, if we tell the clerk about the uncharged item, the clerk would be grateful and thank us for our honesty. We would leave the store with a quite sense of honor that we might never share with another soul. Then, what is it to do with our sense of happiness? In the first case, where we don’t tell the clerk, a couple of things would happen. Deep down inside we would know ourselves as a type of thief. In the process, we would lose some peace of mind and self-respect. We would also demonstrate that we cannot be trusted, since we advertise our dishonor by telling our family and friends. We damage our own reputations by telling others. In contrast, bringing the error to the clerk’s attention causes different things to happen. Immediately the clerk knows us to be honorable. Upon leaving the store, we feel honorable and our self-respect is increased. Whenever we take honorable action we gain the deep internal rewards of goodness and a sense of nobility (高尚). There is a beautiful positive cycle that is created by living a life of honorable actions. Honorable thoughts lead to honorable actions. Honorable actions lead us to a happier existence. And it’s easy to think and act honorable again when we’re happy. While the positive cycle can be difficult to start, once it’s started, it’s easy to continue. Keeping on doing good deeds brings us peace of mind, which is important for our happiness. 1．According to the passage, the positive action in the example contributes to our _________. A．self-respect                                       B．financial rewards  C．advertising ability                                D．friendly relationship 2．The author thinks that keeping silent about the uncharged item is equal to __________. A．lying                                                   B．stealing                          C．cheating                                              D．advertising 3．The phrase “bringing the error to the clerk’s attention” (in para. 5) means __________. A．telling the truth to the clerk                   B．offering advice to the clerk C．asking the clerk to be more attentive      D．reminding the clerk of the danger 4．Which of the following can be the best title of this passage? A．How to Live Truthfully                         B．Importance of Peacefulness        C．Ways of Gaining Self-respect  D．Happiness through Honorable Actions