结核性空洞与肺脓肿最重要的鉴别是：（） A.有无结核接触史 B.临床症状 C.胸部X

订立4年期的劳动合同，双方约定了6个月的试用期，则劳动合同期限为（　　）个月。

A．42

B．48

C．50

D．54

研究显示，大多数有创造性的工程师，都有在纸上乱涂乱画，并记下一些看来稀奇古怪想法的习惯，他们的大多数最有价值的设计，都直接与这种习惯有关，而现在的许多工程师都用电脑工作，在纸上乱涂乱画不再是一种普遍的习惯，一些专家担心，这会影响工程师的创造性思维，建议在用于工程设计的计算机程序中匹配模拟的便条纸，能让使用者在上面涂鸦。 以下哪项最可能是上述建议所假设的( )。

A．对计算机程序中所匹配的模拟便条纸，只能用于乱涂乱画，或记录看来稀奇古怪的想法

B．所有用计算机工作的工程师都不会备有纸笔以随时记下有意思的想法

C．工程师在纸上乱涂乱画所记下的看来稀奇古怪的想法，大多数都有应用价值

D．乱涂乱画所产生的灵感，并不一定通过在纸上操作获得

《麻醉药品和精神药品管理条例》制定的目的是

A．为了继承和发展中医药学，保障和促进中医药事业的发展，保护人体健康，制定本条例

B．为了加强医师队伍的建设，提高医师的职业道德和业务素质，保障医师的合法权益，保护人民健康

C．为加强药品监督管理，保证药品质量，增进药品疗效，保障公民用药安全，维护人民健康

D．为了禁止生产、销售劣药

E．为了加强麻醉药品和精神药品的管理，保证麻醉药品和精神药品的合法、安全、合理使用，防止流入非法渠道

It is difficult to imagine what life would be like without memory. The meanings of thousands of everyday perceptions, the bases (51) the decisions we make, an d the roots of our habits and skills are to be (52) in our past experiences, which are brought into the present (53) memory.

Memory can be defined as the capacity to keep (54) available for later use. It includes not only "remembering" things like arithmetic or historical facts, but also any change in the way an animal typically behaves. Memory is (55) when a rat gives up eating grain because he has sniffed something suspicious in the grain pile. Memory is also involved when a six-year-old child learns to swing a baseball bat.

Memory (56) not only in humans and animals but also in some physical objects and machines. Computers, for example, contain devices for storing data for later use. It is interesting to compare the memory-storage capacity of a computer (57) that of a human being. The instant-access memory of a large computer may hold up to 100000 "words" —ready for (58) use. An average American teenager probably recognizes the meanings of about 100000 words of English. However, this is but a fraction of the total (59) of information which the teenager has stored. Consider, for example, the number of facts and places that the teenager can recognize on sight. The use of words is the basis of the advanced problem-solving intelligence of human beings. A large part of a person’s memory is in terms of words and (60) of words.

59().

A. deal

B. number

C. mount

D. amount

下列选项中不属于软件生命周期开发阶段任务的是【 】。

A．软件测试

B．概要设计

C．软件维护

D．详细设计