题目内容
A guide should advise tourists of the best time to appreciate the scenes, and to view the scenes from the best angle and distance.
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Female tourists prefer story-like introductions and enjoy shopping while male tourists are interested in sports and safari.
Tourists may become bored and critical of the guiding service as time goes by. The guide should offer more entertainments to please tourists.
A guide should reiterate the time and place and time for assembly and departure, and remind tourists to be punctual when the travel draws to a close.
有关贫血的病因分类，下列哪项组合是错误的
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