电子商务系统框架结构包含的层次有
A．国家公共政策
B．一般业务服务
C．网络基础设施
D．信息发布和传输技术
E．技术标准和网络协议
参考答案：B,C,D
The nurse is assessing a 15-year-old female who is being admitted for treatment of anorexia nervos
a. Which clinical manifestation is the nurse most likely to findA. Tachycardia.B. Warm, flushed extremities.C. Parotid gland tenderness.D. Coarse hair growt
起源于宋朝的传统小吃冰糖葫芦是以哪种水果味主要原料的？
