下列热化学方程式或离子方程式中,正确的是[ ] A.甲烷的标准燃烧热△H为-89

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问题:

下列热化学方程式或离子方程式中,正确的是[ ]

A.甲烷的标准燃烧热△H为-890.3kJ/mol,则甲烷燃烧的热化学方程式可表示为:CH4(g)+2O2(g)=CO2(g)+2H2O(g)   △H=-890.3kJ/mol

B.500℃、30MPa下,将0.5molN2(g)和1.5mol H2(g)置于密闭容器中充分反应生成NH3(g),放热19.3kJ,其热化学方程式为:N2(g)+3H2(g)2NH3(g)   △H= -38.6kJ/mol

C. 向明矾溶液中加入过量的氢氧化钡溶液:

 

D. 用浓盐酸酸化的KMnO4溶液与H2O2反应,证明H2O2具有还原性:2MnO42- + 6H+ 5H2O2 = 2Mn2+ + 5O2↑ + 8H2

考点:热化学方程式离子方程式
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       两只蚂蚁争论牛的大小。     

       一只蚂蚁爬到牛的蹄子上,说:“牛比碗大不了多少。”     

       另一只蚂蚁爬到牛角上,说:“不对不对,牛弯弯的,长短跟黄瓜差不多。”     

       牛听了,笑了笑,说:“请你们多走走,再下结论吧。”    

       两只蚂蚁在牛身上爬来爬去,爬了好一会儿还 没有爬遍牛的全身。他们说:“牛真高真大呀!”     

1.请为短文加个题目填在横线上。  

2.请为下列画线字选择正确的读音。

      蚁 má(     ) mǎ(     )   不多chà(     ) chā(     )

3.仿照例子写句子。 

     例:牛真高真大呀! 

     太阳真____真__    啊! 

     ____           真          啊! 

4.这个故事告诉我们什么道理?

                                                                                                      

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Graduation day is a major accomplishment for anyone in high school. After      your whole life in classrooms, though, what will be next? For some people, graduation is the        time they ever want to see a        again. For others, it is the next step in their education. And the few that are not       either way yet will most likely either go on to college or go into the military. There are always a few people in every        class that don't know what to do,        if you make a good choice, you will not be one of them.
Some of those people that decide that they never want to       a classroom again will most likely       some sort of simple jobs. Others will either find a way aside from school to better themselves,       through travel or giving back to the community.
High school graduates that already have their futures        0ut are pretty rare. They are the       who have been preparing for college from the first day that they         high school. They most likely applied early to the schools that they were interested       and have already dedicated themselves to the career        they want. Most of them will become doctors, lawyers, and business people, etc.
The last group of people is the biggest. It is the students who _     know that they want to do something but have no idea what. Some of them will _      the military and proudly serve our country. Others will go on t0       , take basic courses, and then decide what they want to major in. There will be some students even         to a technical school to learn a specific     that they can contribute to the workforce.        is a stepping stone that can lead you on to better things if you will let it.
小题1:
A.costingB.spendingC.takingD.paying
小题2:
A.lastB.firstC.onlyD.special
小题3:
A.classmateB.teacherC.classroomD.blackboard
小题4:
A.worriedB.afraidC.gladD.sure
小题5:
A.learningB.graduatingC.trainingD.cooking
小题6:
A.but B.andC.orD.then
小题7:
A.noticeB.lookC.watchD.see
小题8:
A.set upB.turn upC.take upD.look up
小题9:
A.eitherB.neitherC.bothD.all
小题10:
A.decided B.chosenC.plannedD.realized
小题11:
A. parentsB. studentsC. teachersD. friends
小题12:
A.retumed B.reachedC.wentD.entered
小题13:
A.inB.onC.forD.with
小题14:
A.whoB.thatC.whatD.where
小题15:
A.evenB.everC.onlyD.very
小题16:
A.joinB.takeC.needD.attend
小题17:
A.factoryB.officeC.shopD.college
小题18:
A.working onB.going onC.keeping onD.tuming on
小题19:
A.abilityB.talkC.skillD.job
小题20:
A.Imagination B.EducationC.LearningD.Graduation
题型:选择题

他刚刚到岛上时思考了哪些问题?

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骨折后下肢康复目标要求踝关节()

A.ROM在5°~60°

B.行走时ROM在70°~110°

C.臀大肌,股四头肌和小腿三头肌

D.当足跟着地时屈曲最大,而当足根部离地时,接近完全伸直

E.下肢的主要功能是负重和行走,要求各关节保持充分的稳定

题型:选择题

什么是磁通量?

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