问题
单项选择题
“凌波能信步，苦海岂无边。函数千千万，一次最简单。”是形容：（）。
A、凌波微步
B、函数
C、一次函数
D、微分
答案
参考答案：D
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“凌波能信步，苦海岂无边。函数千千万，一次最简单。”是形容：（）。
A、凌波微步
B、函数
C、一次函数
D、微分
参考答案：D
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| I have only seen my father cry once. It was at the Alton train station, back when the trains still ran. I was on my way to Philadelphia to 1 the train that would take me to Boston and college. I was eager (热切的) to go. College, with its 2 and the promise of the better future had become more interesting. It 3 me to see tears in my father's eyes as he shook my hand and said goodbye. For eighteen years, we had never had a(n) 4 to say goodbye like this. He was taller than me, 5 I was not short. I was going somewhere, and he was seeing me off. He 6 me, but he had not needed to say before, and now his tears were 7 it. The tears in my father's eyes told me that we would have less and less to do with each other. I had taken my 8 from his, and now I was learning it. The train 9 and I boarded (登上) it. My father looked smaller from the train. We 10 goodbye to each other through the window. I was wearing the heavy winter coat that my father had bought for me to keep me from catching a cold in New England. | ||||
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