题目内容
LCD1602的对比度可以通过一个电位器来调节。
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LCD1602和51单片机之间的数据接口只能通过P0口连接。
RS信号是LCD1602的读写信号。
LCD1602接口中的RW信号是用来区分读和写的
Jane: Good morning, this is Jane Peterson.Can I help you?David: Morning, Miss Peterson. This is David Clinton, a ________1 from Dragon Machinery Co.,Ltd in Chicago. I would like to know how to2_____________ an order for some spare parts manufactured by your company.Jane: Well, Mr. Clinton, first of all, you have to make sure the machine 3___________ 4___________ and the 5__________ 6______________of the machine.David:Okay, thank you for reminding me of those details.Jane:Then you may fill in the form7_________from our company's website, or you may also order those8____________parts from the factory directly by9_____________.David: Great! What is the phone number?Jane: Toll free order line 1-800-543-0756.Orders _____________before 12 0'clock will be shipped the same day.David: Thank you.Miss Peterson.Jane: You are welcome.Goodbye!David: Bye.
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