问题
问答题 简答题
论述农产品流通在我国农业生产中的地位和作用？
答案
参考答案：
（1）流通是农业生产过程中不可缺少的基本环节；
（2）流通是系统间、部门间的物质能量交换的流通渠道；
（3）流通是农业生产发展的必要条件；
（4）流通是满足人民对农产品需要的重要环节；
（5）流通可以发挥市场机制的功能，对农业生产起导向作用，促使资源优化配置。
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论述农产品流通在我国农业生产中的地位和作用？
参考答案：
（1）流通是农业生产过程中不可缺少的基本环节；
（2）流通是系统间、部门间的物质能量交换的流通渠道；
（3）流通是农业生产发展的必要条件；
（4）流通是满足人民对农产品需要的重要环节；
（5）流通可以发挥市场机制的功能，对农业生产起导向作用，促使资源优化配置。
| A pilot cannot fly a plane by sight alone. In many conditions, such as flying at night and landing in dense fog, a pilot must use radar, an alternative way of navigating. Since human eyes are not very good at determining speeds of approaching objects, radar can show a pilot how fast nearby planes are moving. The basic principle of radar is exemplified by what happens when one shouts in a cave. The echo of the sounds against the walls helps a person determine the size of the cave. With radar, however, the waves are radio waves instead of sound waves. Radio waves travel at the speed of light, about 300, 000 kilometers in one second. A radar set sends out a short burst of radio waves: Then it receives the echoes produced when the waves bounce off objects. By determining the time it takes for the echoes to return to the radar set, a trained technician can determine the distance between the radar set and other objects. The word "radar," in fact, gets its name from the term "radio detection and ranging." "Ranging" is the term for detection of the distance between an object and the radar set. Besides being of critical importance to pilots, radar is essential for air traffic control, tracking ships at sea, and for tracking weather systems and storms. |
The word "shouts" underlined in Line 5 most probably means ______
A．eavesdrops
B．yells
C．confesses
D．whispers