问题
单项选择题
为增加固一液多相系统的反应速率，下列哪一项措施是无效的（）。
A.搅拌
B.提高液相的浓度
C.增加固相粉碎度
D.增加液相体积
答案
参考答案：D
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为增加固一液多相系统的反应速率，下列哪一项措施是无效的（）。
A.搅拌
B.提高液相的浓度
C.增加固相粉碎度
D.增加液相体积
参考答案：D
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| My family came to America in 1985. 1 of us spoke a word of English.Each morning, I disliked going to school for fear of not 2 what people were saying. Very soon my mother noticed something was 3 me.The pain and care I saw in her moonshaped eyes made me burst into tears. I explained to h  er the 4 I had of going to school."Learning English is not 5 ," my mother said.She cheerfully 6 the two of us work together to learn the language at home.The 7 and determination my mother had were admirable because English was as 8 to her as it was to me. That afternoon,I saw my mother in a different light as she 9 me by the school fence.Although she was the 10 of all the mothers there,her face with her welcoming smile and big, black eyes was the most 11 . The afternoon sun shone 12 on her long,black hair creating an atmosphere that 13 her from others. My mother and I immediately  began reading together and 14 five new words a day.My mother,withher encouraging 15 , made the routine fun and interesting.The fact that she was sacrificing her 16 time before going to work so that I could learn English made me see the 17 she possessed.Very soon I began to comprehend what everyone was saying. It has been seven years since that reading 18 with my mother.She is now 43 and in her second year at college.My brother and I have a strong 19 of who we are because of the strong values my mother established for herself and her children.My 20 and gratitude for her are endless.This is why my mother is truly the guiding light of my life. | ||||
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