问题
单项选择题
对于真性红细胞增多症，下列哪项是错误的（）
A.脾大
B.三系细胞增生
C.EPO降低
D.骨髓细胞外铁和铁粒幼细胞增多
E.血清维生素B12增高
答案
参考答案：D
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对于真性红细胞增多症，下列哪项是错误的（）
A.脾大
B.三系细胞增生
C.EPO降低
D.骨髓细胞外铁和铁粒幼细胞增多
E.血清维生素B12增高
参考答案：D
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| My father woke me up early one summer morning announcing, "Get up. You're going with me to cut grass." The idea 1 my father actually thought I was big enough to help him in his 2 made me feel proud and 3 . From sunup to sundown my father, my younger brother and I 4 in the large yards in a rich part of Atlanta, Georgia. By the end of the day I was tired out, but felt good. I had 5 a hard day's labour and had earned $6. One day my father found some leaves I'd 6 and pulled me aside. "Clear away these leaves," he said 7 ,"and don't make me have to tell you to do it again." The 8 was clear. Today I value the importance of doing a job 9 the first time. It will never 10 to impress the person you are working for. After two years my father told me and my brother that he felt we were 11 enough to do lawns (草 坪) on our own. Every Saturday, we 12 out early in the morning with the same desire and drive we had gained while working 13 our father. Taking care of lawns was not exciting 14 high-paying, but that didn't matter. It taught me that any job is a good job and that 15 I was paid was more than I had before. A newspaper reporter once asked me how someone 16 possible live on a forty-hour- a -week minimum (最低的) pay."My father never worked just forty hours a 17 , and neither have I." I replied. "If you're only working forty hours, you probably don't want to do 18 better than you're doing." In every job I've 19 -from doing lawns to washing dishes-I have learned something that helped me in my next job. If you 20 hard enough, you can learn from any job you do. | ||||
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