题目

某档案馆的保密室进出门有下列要求：甲、乙两资料员必须同时用各自的钥匙（ S甲、 S乙分别表示甲、乙两资料员的钥匙）使灯亮才能进入保密室；而馆长只要用自己的钥匙（ S馆长表示馆长的钥匙）使灯亮就可以进入保密室．下列电路中符合上述要求的是 A． B． C． D． 答案：C【详解】 甲、乙两资料员必须同时用各自的钥匙才能使灯亮就进入保密室 ,说明 S 甲和 S乙串联后连入电路．而馆长只要用自己的钥匙使灯亮就可以进入保密室，说明 S馆长直接连入电路．故 C符合题意．Once, a circle lost a piece of its own. The circle wanted to be whole, so it went around, looking for its____piece. But because it was not complete, it could only roll (滚) very slowly. It enjoyed the flowers and the sunshine____the way. It talked with worms. It found lots of different pieces, but____of them fit. So it left them all by the side of the road and kept on____for the lost piece. Then one day the circle found a piece that fit____The circle put the piece into____It could be whole with nothing lost. It was so happy and began to roll. As it was a perfect circle, it could roll very fast, too fast to see flowers or talk to worms. It realized how different the world was when it rolled so quickly. It felt so sad____it stopped, left its found piece by the side of the road and rolled very slowly.Sometimes we are perfect when we lose something. A man who____everything is poor in some ways. He will never have hopes, dreams or something____He will never know someone loves him or someone is giving him something he has always wanted or never had.We couldn’t be perfect. But we must be brave enough to love, strong enough to forgive, kind enough to share____with others and clever enough to know there is enough love around us and then we can always have a wonderful time in our life.【1】A. miss B. lose C. missing D. losing【2】A. at B. of C. in D. along【3】A. none B. all C. every one D. each【4】A. look B. looking C. to look D. looked【5】A. perfectly B. perfect C. part D. partly【6】A. it B. itself C. them D. themselves【7】A. which B. whether C. that D. what【8】A. own B. has C. owned D. have【9】A. bad B. worse C. good D. better【10】A. kindness B. sadness C. happiness D. illness