试题与答案

磁悬浮列车分为()和()。

题型:填空题

题目:

磁悬浮列车分为()和()。

答案:

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赵某,女,37岁。1980年10月4日初诊。主诉:右胁疼痛反复发作近2年,加重3个月。患者发病的2年前,因工作原因与同事争吵后出现右胁胀痛,且逐渐加重,喜太息,不思饮食,经肝功能及胃肠等有关检查均无异常发现,服中、西药后症状缓解。后疼痛反复发作。3个月前出现针刺样疼痛,时轻时重。昨晚疼痛又作,特来门诊求治。饮食一般,二便正常,无发热,时有太息。检查:舌质微紫暗、苔薄白,脉沉细涩。现右胁刺痛难忍,有时引及右背,拒按,面部有淡黑色斑块沉着。

该病人的中医诊断是()

A.腹痛

B.胁痛

C.鼓胀

D.积聚

E.以上都不是

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题型: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.

(74)处填()。

A.fixed

B.steady

C.variational

D.changeable

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