客户服务，是指企业通过其员工提供（）和（）以满足客户需求的行为。
参考答案：产品；服务
—Could you tell me _______?
—Certainly. In half an hour. [ ]
A. when will the train arrive
B. when the train will arrive
C. when would the train arrive
D. when the train would arrive
鹓动鸾飞（鵷動鸞飛）yuün dîng luán fýi
