There are two basic strategies for improving a firm's profitability-a differentiation strategy and a diversification strategy.

电气控制线路设计要考虑调试、操作与维修方便。A．对 B．错

单项选择题电气控制线路设计要考虑调试、操作与维修方便。

常见的营销与推广的模式有（ ）、app广告、直播带货、打折促销等。 A、电视媒体推广  B、网页推广  C、自...

多项选择题常见的营销与推广的模式有（ ）、app广告、直播带货、打折促销等。
A、电视媒体推广 
B、网页推广 
C、自媒体平台投放 
D、明星效应

Nobody believed his reason for being absent from the cl...

单项选择题Nobody believed his reason for being absent from the class ________ he had to meet his uncle at the airport. A.
why B.
that C.
where D.
because