属于电子商务网站功能评估的评价指标的是（）
A、网站建设质量
B、网站内容覆盖率
C、网站技术性能指标
D、电子商务应用深度
参考答案：D
Thank you for all your hard work last week. I don't think we _____ it without you. [ ]
A. can manage
B. could have managed
C. could manage
D. can have managed
祖父与孙子的亲缘系数为()
A．1
B．1/2
C．1/4
D．1/8
E．1/16
