What is the total surplus of a market? A: the sum of consumer surplus and producer deficit B: the sum of consumer surplus and producer surplus C: the difference between the consumer surplus and producer surplus D: the difference between the highest price that a consumer is willing to pay and the lowest price that a producer is willing to sell

is a heavy producer and consumer of wine.（ ）

The Czech Republic is a big producer and consumer of .

‘Producer—agent—wholesaler—retailer—consumer’ is common choice for _______.

在kafka中，如下关于Producer发送数据的说法错误的是（） A: Producer负责生产数据。Consumer负责消费数据。Producer和Consumer之间需要建立连接 B: Producer既可以发送数据到Broker上。又可以发送数据到Consumer C: Producer作为消息生产者。可以直接将数据写入Zookeeper D: Producer连接任意一个正常的Broker实例就可以产生数据

在Kafka中，如下关于Producer发送数据的说法错误的是？（） A: Producer负责生产数据，Consumer负责消费数据，Producer和Consumer之间需要建立Socket链接 B: Producer既可以发送数据到Broker上，又可以发送数据到Consumer上 C: Producer作为消息生产者，可以直接将数据写入Zookeeper D: Producer连接任意一个正常的Broker实例就可以生产数据

If you are willing to pay $20 for a shirt but you only have to pay $16, the $4 difference is: A: your consumer surplus. B: the producer’s deficit. C: your consumer deficit. D: the producer’s surplus.

Moving production from a<br/>high-cost producer to a low-cost producer will (<br/>) A: lower total surplus. B: raise total surplus. C: lower producer surplus. D: raise producer surplus but<br/>lower consumer surplus.

The following is a synonym of autotrophs A: Primary producer B: Consumer C: Heterotroph D: Predator

【单选题】If the price decreases in a country, what will happen? ( ) A. consumer surplus declines B. consumer surplus rises C. producer surplus declines D. both B and C A. consumer s