问题 问答题 简答题

试述气体输送机械的一般特点?

答案

参考答案:

①动力消耗大

②设备体积庞大

③特殊性——气体的可压缩性

简答题

九年级学生小红的妈妈下岗后,想利用家中多年的积蓄,自己办一家皮鞋厂,但又不明党和国家的方针政策和法律法规,心存顾虑。小红便用在思想品德课上所学的知识,鼓励妈妈。妈妈听后,打消了顾虑,办起了皮鞋厂。你认为小红运用了哪些知识打消了妈妈的顾虑?

                                                                                                                                                                

                                                                                                                                                                

                                                                                                                                                               

                                                                                                                                                               

                                                                                                                                                                

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