2. 计算机
  3. An embedded device is an object that conmins a ________________ computing system．The system，which is completely enclosed by the

An embedded device is an object that conmins a ________________ computing system．The system，which is completely enclosed by the

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问题 An embedded device is an object that conmins a ________________ computing system．The system，which is completely enclosed by the object，may or may not be able to connect to the Internet．Embedded systems have extensive applications in consumer，commercial，automotive，industrial and healthcare markets．It’S estimated that over 15 billion embedded devices have  been connected to the Internet，a phenomenon commonly referred to as the ________________．Generally, all embedded device’s operating system will only nln a single application which helps the  device to do its job．Examples of embedded devices include dishwashers，banking ATM  machines，routers，point of sale terminals(POS terminals)and cell phones．Devices that call  connect to the Interact are called smartorintelligent．If an embedded device can not connect  to the Internet，it is called dumb，Embedded devices in complex manufactured products，such  as automobiles，are often headless．This simply means that the device’S software does not have  a user interface(U1)．In such cases，an in—circuit ________________ is temporarily installed between the  embedded device and an external computer to debug or update the software．Because  embedded systems have limited computing ________________ and strict power requirements，writing  software for embedded devices is a very specialized field that requires knowledge of both  hardware components and ________________．
选项 A、memory
B、operating system
C、driver
D、programming
答案D
解析 嵌入式设备是指一个具有特定计算功能的设备。嵌入式系统由对应的设备组成，该设备可以连接Internet网络，也可以不进行联网。嵌入式系统可以应用到大量的应用中，包括消费类应用、商业应用、自动化应用、工业与健康领域的应用等。据估计，已经有超过150亿的嵌入式设备连接到Internet网络，～般也被称之为IoT。通常，一个嵌入式设备的操作系统仅仅会运行一个单独的应用，例如：洗碗机、银行的ATM取款机、路由器、POS终端设备、手机。连接到Internet网络的嵌入式设备也可以被称为智能终端。假设一个嵌入式设备没有连接到Internet的话，它就会被称之为哑设备。在复杂的工业产品中，例如汽车领域中，很多嵌入式设备是没有界面的。在这种情况下，一般会有一个在线的仿真器，被用于连接嵌入式设备和外部的电脑，以进行嵌入式设备的调试或者软件更新。因为嵌入式设备的计算资源受限，以及具有严格的功耗要求，所以在嵌入式设备上进行软件开发的要求非常严格，需要开发者对嵌入式硬件的基本元素和软件编程都有一定的知识了解。
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