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LCD1602写指令操作流程。

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写数据操作流程。

写出代码表达的含义。void write_com(unsigned char com){RS = 0;RW = 0;P0 = com;EN=0;EN = 1;delay(5);EN = 0;}

[音频]Nowyou'llhearthetwolongconversations.ConversationOne19.A.HehadthoughtChicagowasayoungcity.B.HehadthoughtthatChicagowasverylarge.20.A.FortDearbornwasbuiltin1833intheplacethatwouldbecomeChicago.21.A.Itwasin1893whenChicagowasstillasmalltown.22.A.TheywillreviewtheseminarthisweekonChicagotogether.

[音频]Conversation Two23.A. 9-17.B. 18-26.C. 27-35.D. 36-45.24.A. Jogging.B. Swimming.C. Tennis.D. Cycling.25.A. Launch a new promotion campaign.B. Target the 46 to 55 year-old age group.C. Develop more athletic shoes.D. Sell the fitness apparatus.