听录音,选出合适的答句。 ( ) 1. A. I have six. ( ) 2. A. Oh, it's beautiful! ( ) 3. A. It's OK. ( ) 4. A. She's my mother. B. I can see five. B. I can see 17. B. OK. B. I'm the Easter Bunny. C. I can see four cats. C. Thank you. C. Come in. C. How are you?
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【判断题】规模不经济(Diseconomies of scale)是指在经济实体规模扩大时,产量的增加小于投入要素的增加比例,收益递减。