题目

下列叙述中完全正确的一组是（     ）①常温常压下，1 mol甲基(—CH3)所含的电子数为10NA②由Cu、Zn和稀硫酸组成的原电池中，若Cu极生成0. 2 g H2，则电路通过电子0.2NA③在标准状况下，11.2 L NO与11.2 L O2混合后气体分子数为0.75NA④常温常压下，16 g O3所含的原子数为NA  ⑤1 mol C10H22分子中共价键总数为31NA⑥1 mol Cl2发生反应时，转移的电子数一定是2NA⑦标准状况下22. 4 L水中含分子数为NAA. ①②③④⑤       B. ②④⑤⑥⑦       C. ②④⑤      D. ①Heroes of Our TimeA good heart Dikembe Mutombo grew up in Africa among great poverty and disease. He came to Georgetown University on a scholarship(奖学金) to study medicine — but Coach(教练) John Thompson got a look at Dikembe and had a different idea. Dikembe became a star in the NBA, and a citizen of the United States. But he never forgot the land of his birth, or the duty to share his fortune with others. He built a new hospital in his old hometown in the Congo. Af friend has said of this good-hearted man: “Mutombo believes that God has given him this chance to do great things.”Success and kindness After her daughter was born, Julie Aigner-Clark searched for ways to share her love of music and art with her child. So she borrowed some equipment, and began filming children’s videos(录像) in her own house. The Baby Einstein Company was born, and in just five years her business grew to more than $20 million in sales. And she is using her success to help others — producing child safety videos with John Walsh of the National Center for Missing and Exploited Children. Julie says of her new program: “I believe it’s the most important thing that I have ever done. I believe that children have the right to live in a world that is safe.”Bravery and courage A few weeks ago, Wesley Autrey was waiting at a Harlem subway station with his two little girls when he saw a man fall into the path of a train. With seconds to act, Wesley jumped onto the tracks, pulled the man into the space between the rails(铁轨), and held him as the train passed right above their heads. He insists he’s not a hero. He says: “We have got to show each other some love.”【小题1】What was Mutombo praised for? A. Being a star in the NBA.           B. Being a student of medicine. C. His work in the church.                    D. His willingness to help the needy.【小题2】Mutombo believes that building the new hospital is ______.A．helpful to his personal developmentB．something he should do for his homelandC．a chance for his friends to share his moneyD．a way of showing his respect to the NBA【小题3】What did the Baby Einstein Company do at its beginning?A．Produce safety equipment for children.B．Make videos to help protect children.C．Sell children’s music and artwork.D．Look for missing and exploited children.【小题4】Why was Wesley Autrey praised as a hero?A．He helped a man get across the rails.B．He stopped a man from destroying the rails.C．He protected two little girls from getting hurt.D．He saved a person without considering his own safety.