有机粉尘毒性综合征是由于暴露于以下那种粉尘而引起的非传染性呼吸系统炎症（）
A.含有较高浓度的石墨粉尘
B.含有游离二氧化硅10％以上的粉尘
C.含有革兰阴性细菌及其内毒素的有机粉尘
D.长期吸入高浓度的水泥粉尘
E.含有少量游离二氧化硅的粉尘
参考答案：C
解析：有机粉尘毒性综合征是由于短时间暴露高浓度含有革兰阴性细菌及其内毒素的有机粉尘而引起的非传染性呼吸系统炎症
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| This little story I'm about to tell you happened when I was 11 years old, and I'll never forget it. It was at my friend Jenny's house after 1 one day, and we were doing our homework. While I was there, a friend of Jenny's mom came over to 2 I didn't know her name or 3 what her face looked like. I just 4 her hands, her voice and the lesson I 5 from her. I can't forget that she 6 her hands to introduce herself. It was so 7 , I thought, rich fine skin; then I heard her saying, "Oh no, that is not 8 you shake hands. Let me teach you." She didn't do that at all in a condescending (屈尊的) manner. 9 that, I just remember her voice explaining the 10 of a good handshake of conveying (传达) a 11 sense of self-belief, of looking the other person in the eyes, and of making a warm 12 . Hearing her friendly words, I first understand what being 13 meant. I admired her for 14 time to teach me about one of the important things in life. I was grateful for her not talking down to me 15 I was 11 and didn't know much. I also felt somewhat admired by the way she 16 me. It felt good to be talked to as a(n) 17 , rather than as an 11-year-old child. I also 18 her telling me that if someone isn't aware of something you should show him or her the right direction; don't be afraid to 19 your knowledge. I think of her every time I meet someone 20 , and I'm so thankful for her little lesson. | ||||
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