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问答题
8 LEDs are connected to port 2. They display by the following steps: All the LEDs are turned on for a few second All the LEDs are turned off for a few second The left 4 LEDs are turned on, while the right 4 LEDs are turned off for a few second The right 4 LEDs are turned on, while the left 4 LEDs are turned off for a few second Turn on one by one from left to right
8 LEDs are connected to port 2. They display by the following steps: All the LEDs are turned on for a few second All the LEDs are turned off for a few second The left 4 LEDs are turned on, while the right 4 LEDs are turned off for a few second The right 4 LEDs are turned on, while the left 4 LEDs are turned off for a few second Turn on one by one from left to right
答案：
为了实现这个LED灯的显示模式，我们需要编写一个程序来控制连接到端口2的8个LED灯。以下是一个可能的伪代码实现，假设我...
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问答题
loading and unloading is less important in logistics system which is only serviced for transportation.
答案：
在仅提供运输服务的物流系统中，装卸作业的重要性相对较低。
