若每一条指令都可以分解为取指、分析和执行三步,已知取指时间取指=5△t,分析时间 分析=2△t,执行时
A.5590
B.5595
C.6000
D.6007
A.5590
B.5595
C.6000
D.6007
DOM is a platform-and language-(21)API that allows programs and scripts to dynamically access and update the content, structure and style. of WWW documents (currently ,definitions for HTML and XML documents are part of the specification). The document can be further processed and the results of that processing can be incorporated back into the presented(22). DOM is a(23)-based AP1 to documents, which requires the whole document to be represented in(24)while processing it. A simpler alternative to DOM is the event-based SAX, which can be used to process very large(25)documents that do not fit info the memory available for processing.
A.specific
B.neutral
C.contained
D.related
A.to
B.for
C.than
D.only
Every Turing machine computes a certain(74)partial function over the strings over its alphabet. In that sense it behaves like a computer with a fixed program. However, as Alan luring already described, we can encode the action table of every Turing machine in a string. Thus we might try to construct a Turing machine that expects on its tape a string describing an action table followed by a string describing the input tape, and then computes the tape that the encoded Turing machine would have computed. As Turing showed, such a luring machine is indeed possible and since it is able to simulate any other Turing machine it is called a(75)Turing machine.
A universal Turing machine is Turing complete. It can calculate any recursive function, decide any recursive language, and accept any recursively enumerable language. According to the Church-Turing thesis, the problems solvable by a universal Turing machine are exactly those problems solvable by an algorithm or an effective method of computation, for any reasonable definition of those terms.
A.implement
B.pattern
C.tool
D.model
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