用一个平面去截:①圆锥;②圆柱;③球;④五棱柱,能得到截面是圆的图形是[ ] A 发布时间:2017-05-23 21:07 │ 来源:www.tikuol.com 题型:选择题 问题: 用一个平面去截:①圆锥;②圆柱;③球;④五棱柱,能得到截面是圆的图形是[ ]A.①②④B.①②③C.②③④D.①③④
题型:选择题 –Pardon? I didn’t hear you just now. –I asked .A.that Michelle Obama came to China in MarchB.how long did Michelle Obama stay in ChinaC.when did Michelle Obama visit ChengduD.who Michelle Obama came to China with 查看答案
题型:选择题 患者男性,68岁,因近日咳嗽、咳痰、气急明显,又出现神志不清、紫绀而入院。既往有肺气肿病史。动-脉血气分析pH7.31,PaO2 52mmHg,PaCO2 61mmHg,病人目前最可能出现的是A.肺炎B.肺心病C.呼吸衰竭D.左心衰E.肺癌 查看答案