试题与答案

炒过菜的铁锅未及时洗净,在空气中不久便会因腐蚀而出现红褐色锈斑。请回答: (1

题型:填空题

题目:

炒过菜的铁锅未及时洗净,在空气中不久便会因腐蚀而出现红褐色锈斑。请回答:   

(1)铁锅的锈蚀是_______腐蚀(填“析氧"或“吸氧” )   

(2)写出铁锅腐蚀时负极的电极反应式______________

(3)写出铁锅在中性条件下正极的电极反应式_______________

答案:

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根据h=12gt2得,t=2hg=1s.则落地时竖直方向上的分速度vy=gt=10m/s.设小球的速度方向与水平方向的夹角为α,则tanα=vyv0=1,解得α=45°.因为小球的速度方向与钢板垂直,所以钢板与 水平面的夹角θ=45°.根...

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题型:阅读理解

阅读理解

      There was a park near my home. But I didn't go there very often. Many people said there was nothing special. One afternoon I went into the park and found it was really small. I walked quickly because there

wasn't much to see. I walked for some time and found myself standing in front of two paths. __1__I found that the two paths were different from each other.

      The left one was wide and clean. There were lots of flowers on both sides of the path. Though the

flowers weren't very beautiful, they made me feel good. I decided to take this path. But wait!I looked at

the right one. The path didn't look nice. __2__Grass grew everywhere. For a long time I couldn't make

up my mind.

      __3__It wasn't nice,but I didn't want to give up. At last,I came to the end of the path. Ah!There was

a small garden there. It was beautiful,perhaps the most beautiful garden I had ever seen. __4__

      Many people told me that there was nothing much to see in the park. Now I'd like to tell them that if

they had followed the right way,they would have felt differently. But when I told them about what I had

seen in the park,they just smiled at me without saying a word. I knew they didn't believe me. They couldn't even remember that path because it was so small.

      __5__Don't be afraid to choose a different path. You may get a big surprise!

A.  There is nothing that I want to see.

B.  It looked like it had not been cleaned for months.

C.  After a while a strange feeling made me follow the dirty path.

D.  "Which way should I go?"I asked myself. I looked at one way,then the other.

E.  I told them what happened.

F.  My trip to the park that day made me understand something about life.

G.  There were trees,flowers and chairs. I thought it was the nicest part of the park.

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题型:单项选择题 A3型题

患者,女性,20岁。1年前无明显诱因出现双手指间关节肿痛,保暖后可缓解,未予治疗。一周前双手指间关节肿痛加重,伴双膝关节疼痛、双下肢肌肉疼痛及足跟疼痛,行走困难,面部出现红斑而入院治疗。血液检查:血沉80mmh,白细胞总数3.9×109/L,红细胞计数3.4×1012/L。血红蛋白100g/L,免疫学检查:IgG增高,C3、C4均降低,ANA(+),RF(-)。尿蛋白(++),24小时尿蛋白定量0.50g(正常为0~0.15g)。

该患者应考虑为()

A.类风湿关节炎

B.急性肾盂肾炎

C.系统性红斑狼疮

D.风湿性关节炎

E.干燥综合征

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题型:单项选择题

2009年11月,首届世界低碳与生态经济大会技术博览会在江西南昌召开。在这次大会上,江西共签约项目143个,总投资为:1046.95亿元,先后分三次签约:第一次,与23家央企签约37个合作项目,项目总投资为519.1亿元;第二次,九江市人民政府与中信集团签订旅游基础设施投资框架协议,项目总投资为120亿元;第三次,签约合同项目105个,项目总投资为407.85亿元。

从签约项目主要领域来看,旅游产业项目14个,占9.79%;钨及稀土深加工产业项目4个,占2.82%;医药化工产业项目14个,占9.79%;电子信息产业项目12个,占8.39%。

在签约项目中,与京、浙、沪、粤等省市(地区)签署的项目和投资总额较多。签约项目投资较多的省市(地区)为:北京34个,占23.77%;广东省25个,占17.48%;浙江省17个,占11.89%;上海市6个,占4.2%;港台地区合作项目数10个,占6.99%。

能够从上述资料中推出的是()。

A.这次大会签约项目平均投资额超过8亿元

B.旅游产业签约项目数小于电子信息产业签约项目数

C.钨及稀土深加工产业投资额所占比重小于医药化工产业项目数所占比重

D.在签约省市(地区)中,签约项目数所占比重小于签约投资额所占比重的省市(地区)有3个

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