已知关于x的方程x2+（k+2）x+k-1=0． （1）求证：方程一定有两个不相 发布时间：2017-04-26 12:34 │ 来源：www.tikuol.com 题型：解答题 问题： 已知关于x的方程x2+（k+2）x+k-1=0．（1）求证：方程一定有两个不相等的实数根；（2）若x1，x2是方程的两个实数根，且（x1-1）（x2-1）=k-3，求k的值．
题型：解答题 交际问答(从B栏中找到相应的答案) A( )1. Where is your teacher? ( )2. What's this? ( )3. Whose books are these? ( )4. Who's on duty today? ( )5. What's her name? ( )6. Which car is Mr. Green's? ( )7. What colour are the flowers?( )8. What can you see on the hill? ( )9. How old is your friend? ( )10. Is it a Chinese car? BA. It's a clock. B. They are theirs. C. She's in the classroom. D. The red one is his. E. They are yellow. F. Her name's Wei Hua. G. She's thirteen. H. Yes, it is. I. I am. J. I can see some flowers. 查看答案
题型：解答题 患者男，40岁，2年前因车祸致左胫腓骨开放性骨折，行钢板内固定手术治疗。术后1年手术切口开始出现红肿，压痛明显，X线片提示：内固定在位，未见明显松动。近1个月，局部皮肤出现红肿、破溃，隐约可见内固定钢板，间断出现流脓。X线片提示骨折端髓腔闭塞，死骨形成，患者高热不退，下一步治疗宜采用（）。A.大剂量抗生素治疗感染B.拆除内固定，窦道冲洗引流C.取出内固定，改用髓内钉内固定，皮瓣覆盖创面D.扩大创面，窦道冲洗引流E.取出内固定，改用髓内钉内固定，放置引流F.拆除内固定，改用外固定架固定 查看答案