已知P是双曲线y=2000x上的任意一点,过P分别作PA⊥x轴,PB⊥y轴,A, 发布时间:2017-05-26 16:32 │ 来源:www.tikuol.com 题型:解答题 问题: 已知P是双曲线y=2000x上的任意一点,过P分别作PA⊥x轴,PB⊥y轴,A,B分别是垂足.(1)求四边形PAOB的面积.(2)P点向左移动时,四边形PAOB的面积如何变化?
题型:解答题 根据句子及首字母提示补全单词。1. The twins are b_____ lovely girls.2. I like drawing and I am good a_____ it.3. John is my b_____ friend of all the classmates.4. Her best friend is f_____ than she is.5. That is very i_____ for me to learn English well. 查看答案
题型:解答题 关于骨折的愈合,下列哪项不正确()A.均衡营养,有助于骨折愈合B.手术比手法复位,更能增加愈合机会C.骨折处的血供,影响骨折愈合D.固定不充分不利于愈合E.骨折处感染,有碍骨折愈合 查看答案