问题
单项选择题
人体中那些具有增殖潜能但暂不增殖的细胞称为（）
A.Gl期细胞
B.S期细胞
C.G2期细胞
D.G0期细胞
E.M期细胞
答案
参考答案：D
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人体中那些具有增殖潜能但暂不增殖的细胞称为（）
A.Gl期细胞
B.S期细胞
C.G2期细胞
D.G0期细胞
E.M期细胞
参考答案：D
One winter term during college, I took a history class to fulfill a requirement. The professor was a 1 fellow with red hair. He would walk shyly into the room wearing his hooded (带帽的) winter coat, once not even 2 the hood during the lecture. He was terribly nervous in class and lowered his head 3 looking up through his glasses at his students. So I 4 a little game for myself. I would try to find something in his lecture to ask him an intelligent question about, 5 me to pay attention rather than letting my eyes close. He was obviously 6 to have a question to answer. In fact, his answers were always interesting. I continued to do this every day of the course and found myself actually enjoying the subject. The professor seemed to become a bit more 7 and some of the other students even 8 from time to time. My little game had saved me from being bored, as it was 9 to do. And, I learned quite a bit about ancient world history. Except for all of his strange __10 , he was indeed quite an expert in his field. On the last day of his class, we gathered our 11 and headed out the door. The shy, red-haired professor 12 directly in front of me, with obvious efforts, as I reached the door, and put out his hand. He said, “I want to thank you for making this class so interesting.” As he shook my hand and 13 for the first time, I was so surprised. To me, it had been a pleasant way to 14 the time. I had no idea that all of my question asking had any 15 on him or the others at all. Each of us, through the things we say and do, can have a great effect not just on our own experiences, but those of others.
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