如果线段a：b=3：2，且线段b是线段a、c的比例中项，那么c：b等于（ ） A．
题型：选择题
问题：
如果线段a：b=3：2，且线段b是线段a、c的比例中项，那么c：b等于（ ）
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题型：选择题
When I was a child, I was shocked at the idea that my sisters could be my best friends. Now, I wouldn’t have it any other way. At the time, the idea of my tow sisters being my closest friends seemed strange to me. we fought all the time over toys, food, attention, what to watch on television-you name it, we quarreled 
about it at some point. How could my sisters be my best friends? They weren’t the same age as I. we all had our own friends in school.
My mother never let the three of us forget that sisters are lifelong friends. Her wish like most parents’ was to give us something that she never had. Growing 
up as an only child, she longed for siblings. When she gave birth to three daughters, the fulfillment of her dream had only just begun. She had given each of us a gift and she wanted to make sure we did not take that gift for granted. She would frequently tell us how lucky we were. But there were others, more subtle ways that she encouraged us to grow closer. She never showed favoritism to one daughter over the other-skating, shopping, swimming-so we developed common interests. And when we were teenagers, Mom always punished us equally, giving us yet another bonding（结合的）experience.
We didn’t always get along beautifully and fought just like any other siblings. But somewhere in between Mom’s lectures, the family vacations and the shared memories, we realized that our mother was right. Today I share things with my sisters that I do with no one else. My sister Cindy and I ran the New York City Marathon together, side by side, even holding hands when we crossed the finish lien. When my sister Karen got married, I was her maid of honor. Cindy and I traveled through Europe together and even shared an apartment for two years. The three of us trust each other with our greatest secrets.
It was twenty-three years ago that my mother first asked me who my two best friends were. Today she doesn’t have to. She already knows.
72. As a child, the author was shocked at her mother's idea because________
A. her sisters seemed strange to her
B. her sisters didn't like to be her friends
C. none of the girls had their own friends
D. she and her sisters shares little in common
73. The underline word "siblings" in the second paragraph means________
A. sisters B. parents C. daughters D. friends
74. How did the author's mother encourage her three daughters to grow closer?
A. She punished her daughter differently.
B. She showed equal love to her daughters.
C. She encouraged her daughters to do sports.
D. She often took her daughters to many places.
75.The best title of the passage could be _________.
A. The Greatest Gift B. Mother's Love
C. Growing Experiences D. Unforgettable Memories