全陪在与地陪核对商定行程安排时，如果发现地接社对活动日程做了较大变动时，应马上向全团游客通报。
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导游服务集体有共同的服务对象，共同的工作任务和共同的利益。
A. 对
B. 错
Which of the following criteria qualifies a compound as a vitamin?
A. The compound is necessary for health, but the body is unable to synthesize enough of the compound to maintain health.
B. The compound prevents chronic disease and cancer.
C. The compound is best absorbed if taken in supplement form.
D. The body is unable to synthesize the compound.
Water-soluble and fat-soluble vitamins differ in which way?
A. Water-soluble vitamins are best absorbed in the presence of dietary fat.
B. Fat-soluble vitamins have much less potential for toxicity.
C. Water-soluble are less likely to be toxic.
D. Water-soluble vitamins are stored, whereas fat-soluble vitamins are excreted readily.
Which of the following is most likely to result in vitamin toxicity if consumed daily over a long period of time?
A. Vitamin A supplements
B-vitamin complex
C. Fortified breakfast cereals
D. Spinach, kale, and other greens
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