下呼吸道(lowerrespiratorytract)
参考答案:
下呼吸道是指环状软骨以下的呼吸道,包括气管、支气管、毛细支气管、呼吸性毛细支气管、肺泡管及肺泡。
根据材料内容及首字母提示,写出所缺单词,补全材料。
Hello, boys and girls. My name is David. I’m from Canada. I’m in the USA now. I l 小题1: food here. So I often eat a l 小题2: of food. I have breakfast at home. F 小题3: breakfast, I eat eggs and apples. I d 小题4: like milk at all. I have no time to go home for l 小题5: . The lunch in our school is good. I can have d 小题6: foods for lunch. I eat chicken, tomatoes and oranges. Sometimes I eat cakes and hamburgers. I have dinner at home w小题7: my father and mother. S 小题8: we eat out with our friends. We h 小题9: fish, vegetables and fruit.
What a 小题10: you? Please tell me.
能同时控制生产和销售,既要对成本负责,又要对收入负责,但没有责任或没有权力决定该中心资产投资的水平,可以根据其利润的多少来评价其业绩的中心是( )。
A.成本中心 B.利润中心C.投资中心 D.费用中心