一般来说，贵宾服务从其预订机票的那一刻就已经开始了。
查看答案
自然因素是旅游营销环境的内部环境因素。
A. 对
B. 错
购买力的戴奥不仅取决于收入的高低，还取决于居民档期储蓄和信贷的水平
A. 对
B. 错
Which of the following sentence(s) can help you figure out the meaning of “ambivalent”?
A.…this means that the public needs to have a basic understanding of science, so that it can make informed decisions and not leave them in the hands of experts.
B.It has come to expect the steady increase in the standard of living that new developments in science and technology have brought to continue.
C.But it also distrusts science because it doesn't understand it.
D.Both B and C.
下列不属于甲亢手术适应症的是：
A. 继发性甲亢
B. 中度以上甲亢
C. 儿童甲亢
D. 有压迫症状的甲亢
E. 内科治疗效果不佳或复发的甲亢
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