问题
问答题 计算题
用气球法测得某建筑物居室内氡子体浓度为1.63×10-7J／m3，试计算住在该居室内的人员由于吸入氡子体所接受的年有效剂量当量（已知室内剂量转换因子为1.8Sv／（J•h／m3），室内居留因子为0.8）。
答案
参考答案：
年有效剂量H=8760×0.8×1.8×1.63×10-7=2.06（mSv／A.
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用气球法测得某建筑物居室内氡子体浓度为1.63×10-7J／m3，试计算住在该居室内的人员由于吸入氡子体所接受的年有效剂量当量（已知室内剂量转换因子为1.8Sv／（J•h／m3），室内居留因子为0.8）。
参考答案：
年有效剂量H=8760×0.8×1.8×1.63×10-7=2.06（mSv／A.
| "Everything happens for the best," my mother said whenever I faced disappointment. "If you can 1 , one day something good will happen. And you'll 2 that it wouldn't have happened if not for that 3 disappointment." Mother was 4 , as I discovered after graduating from college in 1932. I had decided to try for a job in 5 , then work my way up to sports announcer. I hitchhiked (搭便车) to Chicago and knocked on the door of every station-and got 6 every time. In one studio, a kind lady told me that big stations couldn't risk 7 inexperienced people. "Go out in the sticks and find a small station that'll give you a 8 ," she said. I hitchhiked home to Dixon, Illinois. While there was no radio-announcing jobs in Dixon, my father said Montgomery Ward had opened a store and 9 a local athlete to manage its sports department. Since Dixon was where I had played high school football, I 10 . The job sounded just right for me. But I wasn't hired. My disappointment 11 have shown. "Everything happens for the 12 ," Mom reminded me. Dad offered me the car for job hunting. I tried WOC Radio in Davenport, Iowa. The program director, a wonderful Scotsman named Peter MacArthur, told me they had already hired a(n) 13 . As I left his office, my 14 boiled over. I asked a1oud," 15 can a fellow get to be a sports announcer if he can't get a job in a radio station?" I was waiting for the elevator 16 I heard MacArthur calling, "What was that you said about sports? Do you know anything about football?" Then he let me stand 17 a microphone and asked me to broadcast an imaginary 18 . On my way home, as I had many times 19 my graduation, I thought of my mother's words. I often wonder what 20 my life might have taken if I'd gotten the job at Montgomery Ward. | ||||
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