病人,男,23岁,13h前腰扭伤,效果较好的治疗是A.腰部热敷 B.青、链霉素肌肉注 发布时间:2017-06-23 06:48 │ 来源:www.tikuol.com 题型:单项选择题 问题: 病人,男,23岁,13h前腰扭伤,效果较好的治疗是A.腰部热敷B.青、链霉素肌肉注射C.腰背部肌肉功能锻炼D.醋酸强的泼尼松龙加普鲁卡因痛点封闭E.红外线局部照射
题型:单项选择题 完形填空。 We know that trees are useful in our everyday life. They 1 us many things, such as wood, oxygen, rubber, medicines and many other things. They can 2 tell us a lot about our climate. The following are the reasons. If you 3 a tree, you can see that it has many rings (年轮). Most trees grow one new ring 4 year. Because ofthis reason, we know 5 a tree is. A tree over a hundred years old means that it has more than a hundred 6 .When the climate is dry or very cold, the trees do not grow very much and their rings are usually 7 . When it iswet and warm, the rings are much thicker. If the rings are suddenly very thin or suddenly very thick, this meansthat the 8 changed suddenly. If we look at the rings of this tree, we can 9 about the climate for a hundredyears. We can see 10 our climate is changing today. ( ) 1. A. tell ( ) 2. A. not ( ) 3. A. cut down ( ) 4. A. many ( ) 5. A. how big ( ) 6. A. trees ( ) 7. A. big ( ) 8. A. climate ( ) 9. A. study ( ) 10. A. how B. ask B. too B. climb up B. every B. how long B. leaves B. thin B. trees B. get B. why C. give C. to C. walk past C. some C. how old C. people C. things C. sky C. learn C. when D. get D. also D. look at D. only D. how much D. rings D. small D. animal D. teach D. while 查看答案
题型:单项选择题 (12分)随着材料科学的发展,金属钒及其化合物得到了越来越广泛的应用,并被誉为“合金的维生素”。为回收利用含钒催化剂(含有V2O5、VOSO4及不溶性残渣),科研人员最新研制了一种离子交换法回收钒的新工艺,回收率达91.7%以上。部分含钒物质在水中的溶解性如下表所示:物质VOSO4V2O5NH4VO3(VO2)2SO4溶解性可溶难溶难溶易溶该工艺的主要流程如下。请回答下列问题:(1)请写出加入Na2SO3溶液发生反应的离子方程式 。(2)催化氧化所使用的催化剂钒触媒(V2O5)能加快二氧化硫氧化速率,此过程中产生了一连串的中间体(如下左图)。其中a、c二步的化学方程式可表示为 , 。(3)该工艺中沉矾率是回收钒的关键之一,沉钒率的高低除受溶液pH影响外,还需要控制氯化铵系数(NH4Cl加入质量与料液中V2O5的质量比)和温度。根据上右图试建议控制氯化铵系数和温度: 、 。(4)经过热重分析测得:NH4VO3在焙烧过程中,固体质量的减少值(纵坐标)随温度变化的曲线如右图所示。则NH4VO3在分解过程中 。A.先分解失去H2O,再分解失去NH3 B.先分解失去NH3,再分解失去H2OC.同时分解失去H2O和NH3 D.同时分解失去H2、N2和H2O 查看答案
题型:单项选择题 关于阿尔茨海默病(AD)的病因学、发病机制,以下错误的是()A.AD患者脑部乙酰胆碱明显缺乏,乙酰胆碱酯酶和胆碱乙酰转移酶活性降低B.AD患者脑中某些神经递质的含量一般减少,如去甲NE、5-HT、谷氨酸等C.AD患者发病与遗传因素有关,有家族史者其患病率比普通人群高D.载脂蛋白E4(APOE4)基因是老年型AD的重要危险基因E.80%左右的AD患者为家族性常染色体显性遗传(FAD.的患者 查看答案