题目

石墨和金刚石都是碳元素的单质，石墨在一定条件下可转化为金刚石。已知12g石墨完全转化成金刚石时，要吸收E kJ的能量，下列说法不正确的是(        )     A．石墨比金刚石稳定        B．金刚石不如石墨稳定  C．等质量的石墨和金刚石完全燃烧，金刚石放出的能量多 D．等质量的石墨和金刚石完全燃烧，石墨放出的能量多 Once there was a very helpful and kind-hearted man. He would help anyone___expecting anything in return.One day while walking along a dusty road, the man saw a wallet, so he___the wallet. But then he found it was____. Suddenly a woman and a policeman turned up and caught him.The woman kept on asking where her____was, but the man answered, “It was empty__I found it.” The woman shouted at him, “Please give it back to me, and it’s my son’s tuition(学费).”The man saw that the woman really felt______, so he handed over all his money. He could see that the woman was a single mother. The woman left and the policeman asked the man more___.One day while the woman was going to her son’s school, she noticed that___was walking behind her. She thought that he___rob (抢劫) her, so she walked to a policeman. He was the same policeman that she had taken along to claim her money. The woman told him about the man following her. They ran to him, and saw that he was the same man that they had caught___days ago.He looked very weak and the woman was____. The policeman said to the woman,“He wasn’t the thief that day, but having heard about your situation, he___you his money.”Then the man told the woman. “Please go ahead and___your son’s tuition. I saw you and followed you to make sure that no one would steal your money again.”The woman was too moved to say___.Life may give you a strange experience: sometimes it shocks you___sometimes it may also surprise you. Be kind and generous. Learn to appreciate what you are given.【1】A. byB. withoutC. forD. with【2】A. threw awayB. put downC. looked forD. picked up【3】A. emptyB. dirtyC. heavyD. cheap【4】A. bagB. sonC. moneyD. home【5】A. beforeB. whenC. untilD. unless【6】A. poorB. seriousC. dangerousD. sad【7】A. questionsB. adviceC. reasonsD. examples【8】A. everyoneB. anyoneC. someoneD. no one【9】A. shouldB. can’tC. mustn’tD. might【10】A. littleB. a fewC. a littleD. few【11】A. happyB. excitedC. surprisedD. successful【12】A. sentB. gaveC. keptD. filled【13】A. payB. borrowC. spendD. take【14】A. anythingB. everythingC. somethingD. nothing【15】A. forB. soC. andD. or