市场营销思考问题以()为出发点。
A.人的基本需求
B.消费结构
C.消费者的需求和欲望
D.产生结构
参考答案：C
当SCON寄存器值为50H时，串行口工作方式为（）
A、同步移位寄存器方式，串口禁止接收
B、8位UART方式，串口禁止接收
C、9位UART方式，串口禁止接收
D、8位UART方式，串口允许接收
As he ______ to his work that he didn't notice that it was already past midnight. [ ]
A. was so busy
B. so devoted
C. was so devoted
D. was so turned
