自2016年1月1日起施行的国家勋章和国家荣誉称号法规定，国家设立国家荣誉称号，授予在经济、社会等各领域各行业做出重大贡献、享有崇高声誉的杰出人士。这说明我国公民依法享有（    ）

在：活性炭、氦气、一氧化碳、氮气、明矾、金刚石中选择适当的物质填空

如图，四棱锥P﹣ABCD的底面是正方形，PA⊥底面ABCD，PA=2，∠PDA=45°，点E、F分别为棱AB、PD的中点．

（Ⅰ）求证：AF∥平面PCE；

（Ⅱ）求证：平面PCE⊥平面PCD；

（Ⅲ）求三棱锥C﹣BEP的体积．

       On my way home I knocked into a stranger as he passed by. “Oh. I'm terribly sorry," I said. “That's all right. Please excuse me too; I wasn't even 1 you. I wish  I didn't hurt you.”
       We were very 2. We said good-bye and went on our way.
      But at home we often 3our loved ones in a different way.
      Later that day, while I was cooking the evening meal, my daughter stood beside me very quietly. When I turned, I nearly 4her down. “Move out of the way.”I shouted. She walked away, tears (眼泪) in her eyes.
      While I lay awake in bed, I realized how5 I'd spoken. So I decided to get up to say sorry to my daughter. On the way to her bedroom, to my surprise, I found some 6by the door of the kitchen. At that time my tears began to fall. I quietly went and got down on my knees by her 7. She woke up and put her arms around my neck when I kissed her. Then I asked, “Did you pick these flowers for me?”
       She smiled, “I found them out by the tree. I picked them 8they're pretty like you. I knew you'd like them. I stood quietly in order to give you a surprise.”“Oh dear, I'm really sorry for the way I acted today; I shouldn't have shouted at you.”
     “ That's okay. Mom. I 9 you anyway.”
       I suddenly realized what a clever way it is to explain the word 10like this: (F) ather (A) nd (M) other, (I) (L) ove (Y) ou!