问题
单项选择题 A3/A4型题
卫生人员欲对某河流进行水质监测，测定指标包括氨氮、亚硝酸盐氮、硝酸盐氮、溶解氧、化学耗氧量、生化需氧量、电导率、氧化还原电位等。
采样时需在水样中加硫酸作为保存剂的测定指标是（）
A.氨氮、溶解氧
B.溶解氧
C.亚硝酸盐氮、溶解氧
D.溶解氧、化学耗氧量、生化需氧量
E.氨氮、亚硝酸盐氮、硝酸盐氮
答案
参考答案：E
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卫生人员欲对某河流进行水质监测，测定指标包括氨氮、亚硝酸盐氮、硝酸盐氮、溶解氧、化学耗氧量、生化需氧量、电导率、氧化还原电位等。
采样时需在水样中加硫酸作为保存剂的测定指标是（）
A.氨氮、溶解氧
B.溶解氧
C.亚硝酸盐氮、溶解氧
D.溶解氧、化学耗氧量、生化需氧量
E.氨氮、亚硝酸盐氮、硝酸盐氮
参考答案：E
One day I decided to quit．I quitted my job, my relationship, my spirituality. I wanted to quit my life. I went to the 36 to have one last talk with God． "Can you give me one good 37 not to quit?" His answer surprised me． "Look around． Do you see the fern（蕨类植物） and the bamboo? When I planted their seeds, I took good care of them．The fern quickly grew from the earth． 38 nothing came from the bamboo seed． During the following three years, the fern grew more plentiful． And 39 , nothing came from the bamboo seed． But I did not quit on the bamboo． Then in the fifth year a 40 sprout（新芽） emerged from the earth． Compared to the fern it was 41 small and insignificant． But just 6 months later the bamboo 42 to over 100 feet tall． It had spent the five years growing 43 ． Those roots made it strong and gave it 44 it needed to survive． I wouldn’t give any of my creations a challenge it could not 45 ．” He said to me． "All this time you have been struggling, you have 46 been growing roots． I would not quit on the bamboo． 47 will I ever quit on you． Don't 48 yourself with others．The bamboo had a different 49 from the fern． Yet they both make the forest beautiful． Your time will 50 ． You will rise high! " "How high should I rise?" I asked． "How high will the bamboo rise?" He asked 51 ． "As high as it can?" I 52 ． "Yes," He said． "Give me glory 53 rising as high as you can．" I left the forest and bring back this story． I hope it can help you see that God will never 54 on you． Never regret a day in your life． Good days give you happiness． Bad days give you 55 ． Both are necessary to life．
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