山东省干细胞工程技术研究中心于2009年2月2日宣布，由这个中心李建远教授率领的科研团队，成功克隆出了5枚符合国际公认技术鉴定指标的人类囊胚。据介绍，此次研究者选择了健康卵细胞志愿捐献者12人，经促排卵获得135枚卵细胞，他们将卵细胞的细胞核剔除后，移入体细胞的细胞核，其中，4枚囊胚的供核体细胞来源于正常人皮肤成纤维细胞，1枚来源于帕金森病患者外周血淋巴细胞，最终成功获取5枚囊胚。以下有关叙述正确的是         

在研究性学习的过程中，针对能源危机、大气污染等问题同学们提出
如下四个活动方案，哪些从理论上讲是可行的                                            

下列化学反应的△H的绝对值(放热量)最大的是

Mr. Smith’s decision to attend       ceremony tomorrow can be seen as       gesture of his intention to improve         the relationship.

    This is Kate Smith. She is 13 years old. She lives in Guangzhou. She studies in No.10 Middle school. Her parents work there. They are both English teachers. They are form the UK. She likes eating junk food. She doesn't like playing sports. She has one healthy habit: She sleeps for 9 hours every night.
    Kate Smith has a brother. His name is Jack Smith. He is 11 years old. He doesn't eat junk food. He likes playing sports. He often runs, plays basketball, and goes swimming. He eats fruit every day. He likes eating vegetables. But he has an unhealthy habit: He sleeps for 6 hours every night.