C。解析:次级消费者(secondary consumers)的功能包括吃初级消费者(Eating primary consumers)、控制初级消费者的数量(Controlling the population of primary consumers)以及在食物链中向上传递能量(Transferring energy up the food chain),但是产生氧气(Producing oxygen)是生产者(如植物)的功能,不是次级消费者的功能。反...
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For example, if a consumer is hungry and buys a slice of pizza, the first slice will have the greatest benefit or utility. With each additional slice, the consumer becomes more satisfied, and utility declines. In theory, the first slice might fetch a higher price from the consumer. However...
The secondary market for video game purchases is a multi-billion dollar industry that some believe is unfair to video game developers. Using the Theory of Reasoned Action (TRA), we investigated user attitudes and subjective norms and their affect on a consumer's intention to buy new video games...
Sectors are used by economists to classify economic activity by grouping companies that are engaged in similar business activities. For example, some sectors are engaged in activities that involve the earliest stages of the production cycle, such as extractingraw materials. Other sectors involve the ...
discuss the impact of human conflict on development of antimicrobial resistance. They overview approaches to limit the spread of antimicrobial resistance, using the ongoing conflict in Ukraine as an example of the challenges and opportunities. Scott J. C. Pallett Sara E. Boyd Emma J. Hutley ...
The majority of respondents had a middle education level; 4 villagers completed primary school and below; 16 villagers were junior high school degrees; 61 villagers were senior high school or technical secondary school graduates; 75 villagers were college graduates or graduates of higher vocational ...
of farmland transfer with e-commerce has occurred in China. Although transaction cost is an important perspective for understanding reforms, few studies have been conducted to explore whether the transaction cost of the Jutudi model would be reduced compared with the traditional model of farmland ...
the secondary MoveNext method on the state machine. This state machine type holds state for the asynchronous method, allowing that state to be persisted across asynchronous await points, if necessary. It also contains the body of the method as written by the user, but contorted in a way that...