问题
单项选择题
生产的效率要求每个厂商（）。
A．任意两种商品的边际替代率等于那两种商品的价格比率
D．任意两种投入的边际技术替代率等于1
C．任意两种投入的边际技术替代率等于那两种投人的价格比率
D．任意两种投入的边际技术替代率等于产品的价格
答案
参考答案：C
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生产的效率要求每个厂商（）。
A．任意两种商品的边际替代率等于那两种商品的价格比率
D．任意两种投入的边际技术替代率等于1
C．任意两种投入的边际技术替代率等于那两种投人的价格比率
D．任意两种投入的边际技术替代率等于产品的价格
参考答案：C
| 完形填空。 | |||
| Kate, Mary, Linda and Peter are good friends. They go out for a picnic __1__ Sunday afternoon. Kate__2__ her teacher, Miss Green, to the picnic. Mary also invites __3__ brother, Tom, to come to the picnic. But Tom would like__4__ TV at home. They have got some food and drinks. Kate __5__ some fruit. Mary has got some__6__ juices and beef. Linda has got some tomatoes __7__ carrots. Peter has got __8__ chicken and hamburgers. Miss Green has got some chocolate. They __9__ , drink, sing and play __10__ the park. They are all happy. | |||
| ( ) 1. A. at ( ) 2. A. meets ( ) 3. A. her ( ) 4. A. to look ( ) 5. A. have got ( ) 6. A. milk ( ) 7. A. and ( ) 8. A. a ( ) 9. A. eat ( ) 10. A. at | B. on B. has B. she B. to watch B. has got B. food B. or B. an B. open B. in | C. in C. invites C. his C. make C. there is C. water C. but C. some C. write C. on | D. / D. tells D. him D. see D. there are D. orange D. so D. any D. ride D. to |