问题
选择题
已知反应4NH3+5O24NO+6H2O,若反应速率分别用v(NH3)、v(O2)、v(NO)、v(H2O)表示,则下列正确的关系是( )
A.v(NH3)=v(O2)
B.v(O2)=v(H2O)
C.v(NH3)=v(H2O)
D.v(O2)=v(NO)
答案
答案:D
根据同一反应中,不同物质表示的化学反应速率之比等于物质的化学计量数之比来判断。
已知反应4NH3+5O24NO+6H2O,若反应速率分别用v(NH3)、v(O2)、v(NO)、v(H2O)表示,则下列正确的关系是( )
A.v(NH3)=v(O2)
B.v(O2)=v(H2O)
C.v(NH3)=v(H2O)
D.v(O2)=v(NO)
答案:D
根据同一反应中,不同物质表示的化学反应速率之比等于物质的化学计量数之比来判断。
My mother has been a true inspiration to me and changed the way I look at life. Since my birth she has made it evident that I would become ____ and that I would be one of the great ones. She has taught me that I can do anything if I put my ____ to it. As a young boy, I struggled to achieve tasks that came ____ to others. I had problems with writing, reading and especially speaking. I didn't talk the way ____ kids did and did not respond to questions or stay alert (警觉的) to my surroundings. My reading was poor ____ with teachers helping me, and my speech was hard to ___. My writing was not at the ____ it should have been. Even simple things like knowing my left from my right or being able to snap my fingers (弹手指) were ____. My mother ____ all my challenges and as a professor with a PH. D. , decided to ____ the situation early in my development. She didn't want me to ____. After a while, we did indeed get over all the problems that had ____ me. She spent hours every day ____ me everything I needed to know, determined to help me learn. ____ her I would not be anywhere close to the level I am now. In addition, she gave ____ for my life. She told me what to do and what not to do. Her expectations have always been high ___ she knows that I can do it. For that, I thank her. She would not allow her son to be incapable. She never ____ on me, and to this day she tells me education is a must. I will be a ____ person if I continue to follow her lead. She encourages me to study hard for my ____ and attend college. She used her gifts as a ____ to help a child—her child—and now I have the opportunity to become something.
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