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【单选题】
液晶1602的R/W管脚功能是（）A.
读/写功能选择端，为0是可以往液晶中写信息；为1是从液晶中读出信息
B.
读/写功能选择端，为1是可以往液晶中写信息；为0是从液晶中读出信息
C.
指令/数据寄存器选择端，为0时，选择指令寄存器；为1时，选择数据寄存器
D.
指令/数据寄存器选择端，为1时，选择指令寄存器；为0时，选择数据寄存器
拍照语音搜题，微信中搜索"皮皮学"使用
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举一反三
【单选题】Shareholder A sold shares of Maplewood Cabinets stock to Shareholder B. The stock is listed on the NYSE. This trade occurred in which one of the following?
A.
primary, dealer market
B.
secondary, dealer market
C.
secondary, auction market
D.
secondary, OTC market
【简答题】现场的信号类型按信号来源分类可以分为——和输出信号A. 输入信号
【简答题】We ________ last night, but we went to the concert instead. A．must have studied B．might study C．should have studied D．would study
【单选题】His shop was so well managed that he sold in just 5 months ________ his competitor sold in a year.
A.
how
B.
what
C.
whether
D.
why
【单选题】Shareholder A sold 500 shares of ABC stock on the New York Stock Exchange. This transaction:
A.
took place in the primary market.
B.
occurred in a dealer market.
C.
was facilitated in the secondary market.
D.
was a private placement.
【简答题】现场的信号类型按信号状态分类可以分为模拟量信号和——A. 数字量信号
【简答题】高频信号按传送的信号性质，又可以分为传送______、______和______三种类型。
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