克罗恩病的粪便检查可出现:() A.不消化食物 B.隐血试验阳性 C.粪中脂肪含量增 发布时间:2018-11-17 05:10 │ 来源:www.tikuol.com 题型:单项选择题 A1/A2型题 问题: 克罗恩病的粪便检查可出现:()A.不消化食物B.隐血试验阳性C.粪中脂肪含量增加D.有粘液及脓血E.以上均是
题型:单项选择题 A1/A2型题 已知正项数列{an}满足a1=1,an+1=an2+2an(n∈N+),令bn=log2(an+1).(1)求证:数列{bn}为等比数列;(2)记Tn为数列{1log2bn+1•log2bn+2}的前n项和,是否存在实数a,使得不等式Tn<log0.5(a2-12a)对∀n∈N+恒成立?若存在,求出实数a的取值范围;若不存在,请说明理由. 查看答案
题型:单项选择题 A1/A2型题 搭配连线。( )1. How much is it? ( )2. Here you are ( )3. What do you want? ( )4. When are we going to eat? ( )5. What are you going to do? ( )6. How are you? ( )7. Who can help me? ( )8. Where's your mum? ( )9. What are you doing? ( )10. Can I help you? A. I'm fine. B. Thank you. C. It's three yuan. D. Sorry, I can't. E. She is at a supermarket. F. At half past eleven. G. Yes, please. H. I am reading a book. I. I want a hamburger. J. I'm going to go to the park. 查看答案
题型:单项选择题 A1/A2型题 35kV架空线路的瓷悬式绝缘子,安装前测量绝缘电阻时,对兆欧表电压等级及在干燥情况下绝缘电阻数值的要求分别是()。A、用1000V的兆欧表,绝缘电阻不得小于50MΩ。B、用2500V的兆欧表,绝缘电阻不得小于500MΩ。C、用5000V的兆欧表,绝缘电阻不得小于500MΩ。 查看答案
题型:单项选择题 A1/A2型题 伤害性刺激作用于皮肤时引起钝痛的过程是()A.痛觉的第一阶段,属于Aδ纤维兴奋B.痛觉的第一阶段,属于C纤维兴奋C.痛觉第二阶段,属于C纤维兴奋D.痛觉第二阶段,属于Aδ纤维兴奋E.痛觉第三阶段,属于Aδ和C纤维兴奋 查看答案