在掌握各种商品的销售量个体指数以及各种商品的基期销售量资料的情况下，计算销售量总指数应采用________指数。
参考答案：加权算数平均数
—Kate, what is _______ hobby class at your school?
—Maybe the piano lessons. Seven out of ten girls in my class take the lessons at the weekend.[ ]
A. more popular
B. the most popular
C. as popular as
D. less popular
某医生值班，凌晨2时接到电话被告知有一名住院的新生儿(日龄3天)突然出现呼吸困难，面色发绀，吐奶两次，该医生应该
A．立即去床边查看B．电话中详细询问病情C．先去翻看患儿病历D．电话中指导护士进行处理E．立即向上级医生汇报
