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问题 多项选择题

输入回路所起的作用是将传感器输入的信号，在（）后，再转换成输入电平。

A.除去杂波

B.把矩形波转变为正弦波

C.把正弦波转变为矩形波

D.数值判定

答案

参考答案：A, C

选择题

我国人口最多的少数民族主要分布在哪个省级行政单位[ ]

A．新      

B．藏      

C．桂      

D．内蒙古
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简答题

党的十七大报告提出：我们必须适应国内外形势的新变化，顺应各族人民过上更好生活的新期待……在十六大确立的全面建设小康社会奋斗目标的基础上对我国发展提出了新的更高要求!

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⑤建设生态文明，基本形成节约能源资源和保护生态环境的产业结构、增长方式、消费模式。

（1）请结合时事知识，在横线上填上恰当的内容。

（2）请结合教材，从其中几方面谈一谈应该如何实现这一目标?

                                                                                                                                                           

                                                                                                                                                           

                                                                                                                                                            

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