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问题 单项选择题 B型题

糖皮质激素（）。

A.作用于细胞核内受体

B.作用于线粒体

C.作用于内质网

D.作用于拓扑异构酶

E.作用于细胞质受体

答案

参考答案：E

解析：2.细胞内受体可分为胞质受体和核受体，类固醇激素糖皮质激素属于细胞质受体。

单项选择题

下列有关地球的说法不正确的是( )。

A．地球的历史可划分为5个地质时代

B．迄今为止地球的年龄约有46亿年

C．地球上的六大板块时刻都在运动

D．地球上的氧气最初来自地球内部
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单项选择题

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.

（75）处填（）。

A．synonymously

B．equivalently

C．substitutionally

D．homomorphously
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