问题
单项选择题
下述哪种剂量下药物可产生副作用（）。
A.治疗量
B.极量
C.中毒量
D.阈剂量
E.无效量
答案
参考答案：A
解析：副作用是在治疗剂量下药物产生与治疗目的无关的其他效应，可以预知，可以对抗，还可以随治疗目的改变而改变，所以选A。
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下述哪种剂量下药物可产生副作用（）。
A.治疗量
B.极量
C.中毒量
D.阈剂量
E.无效量
参考答案：A
解析：副作用是在治疗剂量下药物产生与治疗目的无关的其他效应，可以预知，可以对抗，还可以随治疗目的改变而改变，所以选A。
Dear son, The day that you see me old and I am already not in good health, have patience and try to understand me. If I get dirty when eating, if I can not dress, have patience and remember the hours I 36 teaching it to you. If, when I speak to you, I 37 the same things thousand and one times, do not 38 me, listen to me. When you were small, I had to read to you thousand and one times the same story 39 you got to sleep. When I do not want to have a 40 , neither shame me nor scold me. Remember when I had to chase you with thousand excuses I 41 , in order that you wanted to bathe. When you see my 42 little about new technologies, give me the necessary time and do not look at me with your mocking(嘲弄) smile. I taught you 43 to do so many things: to eat good, to dress well, to confront life…. When at some moment I lose the memory or the 44 of our conversation, let me have the necessary time to remember, and if I cannot do it, do not become nervous,  as the most important thing is not our conversation but surely to be with you and to have you 45 to me.If ever I do not want to eat, do not force me. I know well 46 I need to and when not. When my 47 legs do not allow me to walk, give me your 48 , the same way I did when you gave your first 49 . And when someday I say to you that I do not want to 50 any more ---- that I want to rest forever, do not get angry. Someday you will understand. Try to understand that my age is not lived but survived. Some day you will discover that, 51 my mistakes, I always wanted the 52 thing for you and that I tried to prepare the way for you. You must not feel sad, angry or impotent(无可奈何) for seeing me 53 you. You must be next to me, try to understand me and to help me as I did it when you 54 living. Help me to walk, help me to end my way with love and 55 . I will pay you by a smile and by the immense love I have had always for you. I love you, Son. Your father
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