已知二叉树BT的后序遍历序列是dabec，中序遍历序列是debac，它的前序遍历序列 发布时间：2018-07-18 00:09 │ 来源：www.tikuol.com 题型：单项选择题 问题： 已知二叉树BT的后序遍历序列是dabec，中序遍历序列是debac，它的前序遍历序列是______。A．cedbaB．acbedC．decabD．deabc
题型：单项选择题 完形填空。 I'll never forget one summer day in 1975. On that day my 1 suddenly died because of an unexplained illness at the age of 36. Later that afternoon, a police officer 2 to my house to ask for my father's permission (允许) for the hospital to 3 mother's valve (心脏瓣膜). I was greatly sur-prised. I ran into the house in tears. At 14 I just couldn't understand why people would take apart (分解) a person I 4 . 5 my father told him, "Yes." "How can you let them do that to her?" I 6 him. " Linda," he said 7 , putting his arms around me, "the greatest present you can give is a part of 8 . Your mother and I decided long ago that if we can make a person's life 9 after we die, our death will have meaning." The lesson my father taught me that day became one of the most 10 in my life. Years passed. I married and had a family 11 my own. In 1996 my father became seriously ill. With a smile he told me that when he died, he wanted to donate (捐赠) 12 was in good condition (状况), especially his eyes. My father died and we donated 13 as he had wanted. Three days later, my daughter said, "Mum, I'm so 14 of what you did for Grandpa." At that moment I realized that my father gave 15 his eyes. What he left behind sparkled (闪烁) in my daughter's eyes-pride. ( )1. A. father ( )2. A. shouted ( )3. A. operate ( )4. A. loved ( )5. A. So ( )6. A. reported ( )7. A. quietly ( )8. A. yourself ( )9. A. worse ( )10. A. wonderful ( )11. A. at ( )12. A. however ( )13. A. his heart ( )14. A. afraid ( )15. A. much more than B. mother B. sent B. use B. lost B. As B. said to B. happily B. myself B. poorer B. important B. with B. which B. his eyes B. tired B. less than C. grandma C. came C. make C. forgot C. But C. told C. angrily C. himself C. better C. warm hearted C. of C. whoever C. his life C. full C. many more than D. grandpa D. reached D. repair D. remembered D. And D. cried at D. loudly D. herself D. more helpful D. beautiful D. for D. whatever D. his ears D. proud D. as much as 查看答案
题型：单项选择题 某商品流通企业经销某种商品的变动费率为0.8，固定成本分摊为8万元，该种商品的销售单价为 1500元/台，计划期的目标盈利额为4万元，预计在计划期销售( )才能完成目标盈利额。A．500台B．450台C．400台D．350台 查看答案
题型：单项选择题 近期，世界自然保护联盟（IUCN）提出了生态系统生产总值（GEP）的核算方式。GEP是一套与国内生产总值（GDP）相对应、能够衡量生态价值的统计与核算体系。推行GEP核算（）①摒弃了传统的GDP核算方式②科学反映了生态文明建设成果③实现了政府职能的转变④有利于推动全面小康社会的建成A、①②B、①③C、②④D、③④ 查看答案