导游人员应如何处理旅游者口头投诉
参考答案：
①高度重视；②仔细倾听；③尊重客人；④调查了解；⑤迅速答复；⑥记录在案；⑦积极改进。
x2+8x+k=（x+4）2，则k=______．
Five million, five hundred and fifteen thousand, one hundred and fifty-one is __________.[ ]
A. 5,515,151
B. 5,151,151
C. 5,151,515
D. 5,551,155
lion, five hundred and fifteen thousand, one hundred and fifty-one is __________.[ ]