问题
单项选择题
实现电子商务的基础设施是（）。
A.网络层
B.信息传输层
C.业务服务层
D.数据库层
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
实现电子商务的基础设施是（）。
A.网络层
B.信息传输层
C.业务服务层
D.数据库层
参考答案：A
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| Mrs. Pillar was one of my second grade teachers. She was a great teacher. However, I will always remain grateful to her for what she did for me more than a decade later. As a freshman in college, I was involved in a near fatal " 1 " when I walked into a robbery at a convenience store. One of the thieves 2 me in the head, pumping a bullet into my brain. The thieves, as well as most people, thought that I was dead. 3 , they were wrong. However, it was a severe and difficult battle getting back into the mainstream of life. I had to 4 of college to be hospitalized. Even after I was discharged from the hospital, I 5 many hours of intensive therapy (治疗). I had to relearn practically everything, including walking, talking, 6 yes, math. To help with that task, Mrs. Pillar volunteered to come to the hospital and later to my house once a week, to work with me. At first, the material that she presented appeared, to most people, to be very 7 math skills. Then, as time progressed, and I made 8 , my "homework" became progressively more difficult. I remember very 9 how she would come to my home on Sundays, sit with me at kitchen table, and throw various coins on the table. She would ask me to show her 38 cents, 17 cents, 63 cents. It was 10 for me, but she also made it fun. After a year and a half, I had progressed sufficiently, both 11 and mentally, to learn to college. Once there, I 12 therapy regularly, and four years later I graduated from the University of Texas at the top of my class. Following that, I went to graduate school. | ||||
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