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处理医疗事故，应当遵循，，，，的原则，坚持实事求是的科学态度，做到，，，__。

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导游人员与旅游者是服务者与被服务者的不平等关系。 ( )

A. 对
B. 错

Having no language, infants cannot be told what they need to learn. Yet by the age of three they will have mastered the basic structure of their native language and will be well on their way to communicative competence. Acquiring their language is a most impressive intellectual feat. Studies of how children learn language generally agree that the most remarkable aspect of this feat is the rapid acquisition of grammar. Nevertheless, the ability of children to conform to grammatical rules is only slightly more wonderful than their ability to learn words. It has been reckoned that the average high school graduate in the United States has a reading vocabulary of 80,000 words which includes idiomatic expressions and proper names of people and places. This vocabulary must have been learned over a period of 16 years. From the figures, it can be calculated that the average child learns at a rate of about 13 new words per day. Clearly a learning process of great complexity goes on at a rapid rate in children. In Line 7, the word "which" refers to______

A. their ability
B. reading vocabulary
C. idiomatic expression
D. learning process

面向对象的开发方法中， (52) 是面向对象技术领域内占主导地位的标准建模语言，用这种语言描述系统与外部系统及用户之间交互的图是 (53) 。

A. RUP
B. C++
C. UML
D. Java

地方性卫生法规是由依法制定的，效力不超出的卫生方面的规范性文件。