已知等差数列{an}的前13项之和为13π4,则tan(a6+a7+a8)等于_ 发布时间:2017-04-22 13:23 │ 来源:www.tikuol.com 题型:填空题 问题: 已知等差数列{an}的前13项之和为13π4,则tan(a6+a7+a8)等于______.
题型:填空题 根据句子意思,用方框内所给词的适当形式填空,每词只能用一次。(5分)fish study farm glass live1. Michael wants in Haikou. He likes Haikou very much. 2. My father often goes in the morning. 3. Kangkang is a student. He in a high school. 4. His father is a . He works on a farm. 5. Please give me two of water. 查看答案
题型:填空题 他说:“郑樵有史识而未有史学,曾巩具史学而不具史法,刘知几得史法而不得史意,此余《文史通义》所为作也。”——《志隅·自序》。“他”还主张A.学术研究当“经世致用”B.历史学家“三长”说C.治史当“有资于治道”D.进行一场“史界革命” 查看答案
题型:填空题 患者,女性,56岁,腹胀、腹痛半年余,生命征稳定,查体:消瘦,剑突下压痛。胃食管吞钡造影示胃壁僵硬,蠕动减弱,胃小弯近幽门侧可见胃轮廓内龛影,大小约5cm×5cm。大便潜血试验阳性。如患者经检查确诊为胃癌,未见明显转移,应首选的治疗是()。A.单纯手术B.单纯化疗C.局部放疗D.手术+术后化疗E.手术+术后化疗+放疗 查看答案