问题
问答题 简答题
简述硫氰酸汞分光光度法测定空气中敌百虫时，应如何清洗吸收管、比色管、吸管和比色皿等器皿，清洗后如何检查是否清洗干净。
答案
参考答案：
应该用去离子水或蒸馏水洗涤，以防氯离子沾污，洗净后可用试剂空白液检查，再洗净后使用。
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简述硫氰酸汞分光光度法测定空气中敌百虫时，应如何清洗吸收管、比色管、吸管和比色皿等器皿，清洗后如何检查是否清洗干净。
参考答案：
应该用去离子水或蒸馏水洗涤，以防氯离子沾污，洗净后可用试剂空白液检查，再洗净后使用。
One can have many experiences, but the one I never forget is my bicycling trip in Taiwan. When we were going to 46 school, my teacher suggested that we could do something special to remember our school life. After a long discussion, we decided to travel 47 the whole island by bicycle. We began to get some training to make our 48 stronger. So we ran 3,000 meters after school. At first, I could only ran about 2,000 meters. My legs were heavy like steel and my heart 49 very fast. After two weeks of training, I could run 3,000 meters 50 . We started our journey the last week of July. We rode about 100 kilometers 51 . It was very hot and our clothes were 52 all the time. One day, we were riding up the mountain when there were 53 wrong with my bicycle, and I fell and was hurt. I almost gave up and didn’t want to 54 the trip, but I tried to solve the problems successfully and kept on. Fifteen days passed, we returned to school again. We were so 55 . This experience was like a miracle for me. I learned that I could do what I want to.
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