Artificial intelligence (AI) ,an interdisciplinary field, is usually regarded as a branch of computer science, dealing with models and systems for the performance of functions generally associated with human intelligence, such as (71) and learning.

In AI, knowledge-based system is an information (72) system that provides for solving problems in a particular domain or application area by drawing inferences from a knowledge base. Moreover, some knowledge-based systems have learning capabilities.

Expert system (ES) indicates the knowledge-based system that provides for solving problems in a particular domain or application area by drawing inferences from a knowledge base developed from human (73) . Some expert systems are able to (74) their knowledge base and develop new inference rules based on their experience with previous problems. The term "expert system" is sometimes used (75) with "knowledge-based system", but should be taken to emphasize expert knowledge.

（72）处填（）。

A．supervisory

B．manipulating

C．management

D．processing

恶组病理学的基本特点包括（）

A.浸润病变程度不一

B.不累及非造血组织

C.易形成包块

D.病理化主要在肝脏、脾脏、淋巴结和骨髓

E.浸润病变分布不一