题目内容
A．3B．5C．8D．13
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A．CGI脚本B．RPCC．DNSD．IMAP
Embedded system is(66)special computer system which is scalable on both software and(67). It can satisfy the strict requirement of functionality,(68), cost, volume, and power consumption of the particular application. With rapid development of(69)design and manufacture, CPUs became cheap. Lots of(70)electronics have embedded CPU and thus became embedded systems. For example, PDAs, cellphones, point-of-sale devices, VCRs, industrial robot control, or even your toasters can be embedded system.
An embedded operating system is the(71)program that manages all the other programs in an embedded device after initial load of programs by a(an)(72). It normally guarantees a capability within a specified(73)size and(74)constraint as well as with application programs. It also n0rmalty has small foot print including initial boot loader, OS kernel, required device drivers,(75)for the user data and so forth. It has very-likely structure of a normal operating system however mainly differentiated by some factors such as type of pre-installed device, functional limits, taking designed job only.
Which of the following factors was ultimately responsible for bringing down the civilization of ancient Egypt？
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