医疗事故是指医疗机构及其医务人员在医疗活动中，违反医疗卫生管理法律、行政法规、部门规

在食管癌组织学分类中，腺癌占()

A.3~4% 

B.5~10% 

C.10%以上 

D.20% 

E.30% 

遗精一证君相火动，心肾不交型的治则是（）

A.清心泻水，补益心脾 

B.清心安神，滋阴清热 

C.清热利湿 

D.调补心脾，益气摄精 

E.补益肾经，固涩止遗

下列哪些骨折脱位有可能出现缺血性坏死

A．距骨颈骨折

B．股骨颈骨折

C．舟骨腰部骨折

D．月骨骨折脱位

E．股骨粗隆间骨折

单人值班的变电站操作时，运行人员根据发令人用（）传达的操作指令填用操作票，复诵无误。

A.网络；

B.传真；

C.电话；

D.书面

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