进行头孢菌素类注射剂的皮肤敏感试验的药物浓度为（）
A.300μg
B.50U/ml
C.300U/ml
D.300μg或500μg
E.300U/ml或500U/ml
参考答案：D
解析：由此题可掌握的要点是审核处方是否注明过敏试验的药物及试验结果的判断。头孢菌素类注射剂皮肤敏感试验的药物浓度为300或500μg（D）。与之容易混淆的是青霉素注射剂皮肤敏感试验的药物浓度为500U/ml。误判的陷阱是5个备选答案中有3个浓度单位是U/ml。该题的正确答案是D。
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| I’m an American.Years ago, I traveled to the north of Thailand. I 1 the heat, the noisy streets, the busy markets and the smell of Thai dishes.I enjoyed my 2 there very much.However, there is one thing that I wish I hadn’t done. One day, I set off from my hotel to a temple that_3_me.It was a very 4 day.As I walked past some buildings, I glanced between two 5 buildings.There, an old woman in traditional clothing 6 on the dusty rubble (碎石). The terrible thought crossed my mind that she might be 7 . Feeling quite helpless, I 8 her. Her face was sunkissed.She looked quite beautiful but very ill. I 9 reached into my pocket to find some 10 .Then I pushed it into her hand.It was enough for her to 11 for a few months.At this moment, she opened her large, brown eyes and 12 the prize I’d given her.I felt like the“ 13 stranger”. 14 a common language, she looked at me with the wisdom and pity that could burn into a soul.She weakly 15 the money.She stood up and walked away. I was 16 , with the money in my hand.It took me at least a kilometer of walking to 17 I was quite the fool.She didn’t need money. 18 she needed shade, a bottle of water or just some comfort.She was the one who taught me a good 19 . That evening, I sat thinking over my “kindness”. This beautiful woman made me know that not everyone would 20 someone else’s money.We should be kind to others, but we should choose the right way. | ||||
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