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问题 多项选择题

完全垄断市场具有( )特征。

A．只有一个生产者

B．完全垄断者的产品是没有合适替代品的独特性产品

C．其他企业进入这一市场非常困难

D．垄断企业对价格有较大程度的控制

E．不存在产品差别

答案

参考答案：A,B,C,E

解析： 垄断企业所生产的产品有一定的差别或者完全无差别。

听力题
填空，选择适当的单词用其正确的形式填空。 （15）
 words  , hear  , save  , ear  , suddenly , they ,try  ,  trouble ,  sure , hard  ,
Some frogs were playing in the forests .   __小题1:__, two of them fell into a hole . The other frogs ___小题2:__ to help them . When they saw how deep the hole was , they cried to the two frogs that they couldn’t _小题3:__them at all . The two frogs didn’t seem to ___小题4:___ them . They still tried __小题5:___ best to jump up . The other frogs kept saying they  were__小题6:___ to died .Finally , one of the two frogs believe the other frogs ’__小题7:_, Then he fell down and died .
The other frog , however , didn’t care . He jumped as __小题8:____ as he could . At last , he jumped out . The other frog asked , Didn’t you hear us ? He said there was something wrong with his ___小题9:____, He thought they were cheering him on all the time .
When people are in __小题10:____, an encouraging word can help them out while a discouraging one can kill them .
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单项选择题

在日常销售中，如当日销量异常放大或缩小时超过日均销量的（）以上），各企业应立即分析原因，及时上报上级部门并在授权范围内采取措施进行调控。

A.±10%

B.±20%

C.±30%

D.±40%
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