由于饭店服务是无形的，销售前顾客很难感知和判断其质量和效果。()
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A. David has made a wrong choice to work in Seattle.
B. David should have consulted her opinion before quitting.
C. David will suffer setbacks in his work choices.
David is a trend-setter in work choices.
行政机关实施检验、检测、检疫，应当自受理申请之日起五日内指派1名工作人员按照技术标准、技术规范进行检验、检测、检疫。()
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