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问题 填空题

某一样本数据进行分组，已知数据的极差是50，确定分组组距为5，则可得分组的组数是______．

答案

∵一个样本数据，其极差为50，分组时组距为5，

∵50÷5=10，

又∵数据不落在边界上，

∴可分成组数是10+1=11．

故答案为：11

单项选择题

The Turing machine is an abstract (71) of computer execution and storage introduced in 1936 by Alan Turing to give a mathematically precise definition of (72) . or ’mechanical procedure’. As such it is still widely used in theoretical computer science, especially in (73) theory and the theory of computation. The thesis that states that Turing machines indeed capture the informal notion of effective or mechanical method in logic and mathematics is known as Turing’s thesis.

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.

（75）处填（）。

A．universal

B．special

C．complete

D．changeable
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单项选择题 B1型题

溢饮的病位在（）

A.胸膈

B.头面

C.肠胃

D.胁下

E.肌表
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