问题
单项选择题 A1/A2型题
在细胞周期中的肿瘤细胞，对放射线最敏感的细胞期是（）。
A.S期和G2/M期敏感性相同
B.GO/G1
C.G2/M
D.S
E.以上各期细胞敏感性相同
答案
参考答案：C
解析：实验表明，处于不同周期时相的细胞放射敏感性是不同的。总的倾向是处于S期的细胞最为耐受，处于G2和M期的细胞最为敏感。
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在细胞周期中的肿瘤细胞，对放射线最敏感的细胞期是（）。
A.S期和G2/M期敏感性相同
B.GO/G1
C.G2/M
D.S
E.以上各期细胞敏感性相同
参考答案：C
解析：实验表明，处于不同周期时相的细胞放射敏感性是不同的。总的倾向是处于S期的细胞最为耐受，处于G2和M期的细胞最为敏感。
根据短文内容，将下面A－E五个句子分别填入文中空缺处，使补全后的短文意思通顺，结构完整。（10分）  Mr. Webster manages a bar in our town. Its name it The White Horse, for a picture of a white horse was once hung on the wall. 小题1: but in the past things were quite different. At that time, Mr. Webster was much worried about his bar. One day a friend of his came, looked around and said, “Take down the picture of the white horse and change it for a picture of a black one.” “ 小题2: ” Mr. Webster said. “Yes, but just do it.” His friend said and went out of the bar. Mr. Webster went to an artist and said, “ 小题3: ” The next day a picture of a black horse appeared on the wall. Soon after the door opened, a man came in and shouted, “ 小题4: The picture on the wall is different from the name.” Then he sat down and drank something. 小题5: and the another and another. A lot of people came in and said, “The picture on your wall is wrong.” But they all stopped and drank in Mr. Webster’s bar. From then on, Mr. Webster was happy again.
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