从供选择的答案中选出应填入下面一段英文中______内的正确答案。 Bluetooth is a telecommunications indus
从供选择的答案中选出应填入下面一段英文中______内的正确答案。
Bluetooth is a telecommunications industry(1)specification that describes how mobile phones, computers, and personal digital assistants (PDAs) can be easily interconnected using a short-range(2)wireless connection. Using this technology, users of cellular phones, pagers, and personal digital assistants can buy a three-in-one phone that can(3)double as a portable phone at home or in the office, get quickly(4)synchronized with information in a desktop or notebook computer, initiate the sending or receiving of a fax, initiate a print-out, and, in general, have all mobile and fixed computer devices be totally(5)coordinated.
Bluetooth requires that a low-cost transceiver chip be included in each device. The transceiver(6)transmits and receives in a previously unused frequency band of 2.45 GHz that is available(7)globally (with some variation of bandwidth in different countries), In addition to data, up to three voice(8)channels are available. Each device has a unique 48-bit address from the IEEE 802 standard. Connections can be point-to-point or(9)multipoint. The maximum range is 10 meters. Data can be exchanged at a rate of 1 megabit per second (up to 2 Mbps in the second generation of the technology). A frequency hop scheme allows devices to(10)communicate even in areas with a great deal of electromagnetic interference. Built-in encryption and verification is provided.
供选择的答案：
1．globally 2．coordinated 3．multipoint 4．communicate 5．specification
6．transmits 7．wireless 8．double 9．channels 10．synchronized
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discipline$progranun/ng$charactenstics$computer$physical本句是对编程的定义。编程是一个学科，故选(4)。
[参考译文]程序设计是一门包含了许多工程和编程方面的学科。尽管这些方面的大部分是相关 的，但每个方面都有许多自己的特点和目标。大部分自然科学课程中包含了广泛的编程课 程，每门课程强调编程的不同方面，这反映了在计算机教学中所取得的进步。