问题
单项选择题
下列何者与特异性肿瘤标志物不符
A．为某种肿瘤所特有
B．与肿瘤的大小和分期相关
C．可微量存在于正常细胞
D．可做治疗检测
E．应用相应的单抗可以检测出肿瘤细胞表面抗原
答案
参考答案：D
解析：肿瘤标志物条件为特异性强；诊断灵敏度高；量或血清浓度应与肿瘤组织大小呈正相关。但不能用于治疗。
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下列何者与特异性肿瘤标志物不符
A．为某种肿瘤所特有
B．与肿瘤的大小和分期相关
C．可微量存在于正常细胞
D．可做治疗检测
E．应用相应的单抗可以检测出肿瘤细胞表面抗原
参考答案：D
解析：肿瘤标志物条件为特异性强；诊断灵敏度高；量或血清浓度应与肿瘤组织大小呈正相关。但不能用于治疗。
I was nineteen years old the first time I saw my own true character. My trip to and from work each day included a ten-minute walk through the heart of downtown, where the 36 often gathered. Like most busy citizens, I learned to 37 those nameless faces. When it came to homeless beggars, my 38 life experience had led me to one 39 that they are on the street because they choose to be, probably due to alcohol or drugs. It was an extremely cold day. When I passed the groups of beggars as usual, I heard a shaky voice target me. “Spare some change?” he asked. I didn’t even 40 looking up at his nameless face. I briefly 41 him walking into a liquor store and buying whiskey with the money we spared him. Like most teenagers, it took me only moments to 42 him. “I have no money on me,” I said quickly. Looking back now, I feel as if God had set out that day to teach me a lesson. And God 43 . Just a few feet past him, I managed to find the only ice patch on the sidewalk. I 44 and landed heavily on my right knee. The 45 was almost killing me as I tried to get up. Then I heard a shaky voice only inches above me. “Are you all right?” he asked. I knew immediately this was the man I had just rushed past. Even in pain, I 46 took a quick moment to sniff for the smell of alcohol on his breath. There was none. He wasn’t 47 . I saw the 48 in his eyes. I 49 to get to my feet. He held my arm as I walked difficultly to the nearby bus stop. “My name is Mike,” he said. “That’s quite a fall you took, and you really need to get it checked by a doctor,” he said with deep 50 . “This bus goes past the hospital,” I said. Mike paused, and a look of sudden 51 crossed his face. He reached into his pocket and pulled out a small cup. He took out all the change and held it out toward me. “I think there’s just enough here for you to take the bus,” he said. I was highly embarrassed as I remembered my 52 . I reached for my purse and took out my change. At least ten dollars. I offered Mike all my change. “Thank you and take care of yourself,” I said. Both of us knew that few minutes earlier I couldn’t have 53 what happened to him. Mike held his cup tightly, 54 it as if it were the first gift he had ever received. A half cup of change seemed too small a gift for the man who gave a 55 to every nameless face I’ve ever seen.
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