1．小李是数学课代表，收发作业认真负责，可自己的作业写得很马虎。有人给他提意见，他说：“对集体的事情我应当认真负责，写作业是自己的事，马虎一点没什么。”

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2．有的同学说，情绪是可以调节和控制的，对人的身体不会产生多大影响。

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3 ．放学路上小明遇到几个社会青年向同学索要“保护费”，及时拨打“110”报警。

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与外部设备接口交换信息任务实为可编程序控制器与（）交换信息。