已知△ABC的顶点A(3,0),B(0,3),C(cosα,sinα),其中0< 发布时间:2017-04-24 14:59 │ 来源:www.tikuol.com 题型:解答题 问题: 已知△ABC的顶点A(3,0),B(0,3),C(cosα,sinα),其中0<α<π.(Ⅰ)若|AC|=|BC|,求角α的值;(Ⅱ)若△ABC的面积为S△ABC=72,求sinα-cosα的值
题型:解答题 女性,60岁,早晨起床时发现右上下肢麻木,但可以自行上厕所,固到卧室因右下肢无力摔倒。检查:神志清楚,右侧轻偏瘫,偏身感觉减退。患者入院后病情加重,发病36小时检查:嗜睡,右上下肢肌力0级。为明确诊断,最有鉴别价值的辅助检查为()A.脑血管造影B.头颅CTC.腰穿D.TCDE.SPECT 查看答案
题型:解答题 从方框中选择合适的选项,补全对话。A: Have you finished your homework? B: 1 Exercise Three is very difficult. A: Don't worry. I'll help you. B: 2 But I think I can do it myself. Could you lend me your English-Chinese dictionary? A: 3 Here you are. B: Thanks a lot. Is Miss Gao in the office? A: Oh, no. She's out at the moment. B: Where is she? Do you know? 4 A:I think she's at the library. She told me she wanted to borrow some books.B: 5 A .Of course. B.Then I'll have to wait foe her. C.Not yet. D.It's very kind of you. E.I have some questions to ask her.1. 2. 3. 4. 5. 查看答案
题型:解答题 根据流感病毒核蛋白与基质蛋白抗原性的不同,流感病毒又可分为甲、乙、丙3型。人甲型流感病毒新亚型可能来源于动物,乙型流感病毒能引起人的呼吸道感染,丙型流感病毒也是感染人的病毒。3个型流感病毒没有共同抗原,都能感染人,但感染的范围不同,流行程度不同,其中哪一型容易引起大规模流行?()A.甲型B.乙型C.丙型D.甲乙混合型E.乙丙混合型 查看答案