To see what is right and not to do it is cowardice. It is never a questi...

Boldness and decision command, often even in evil, the respect and concu...

Just because you’re struggling doesn’t mean you’re failing. Every great ...

As selfishness and complaint cloud the mind, so love with its joy clears...

Never help a child with a task at which he feels he can succeed. 之前说的都是在...

Reputation is often got without merit and lost without fault. 平均数函数看起来就大...

Fine is fine. 今天来看一下COUNT家族和IF家族的合体：COUNTIF函数及COUNTIFS函数。 COUNTIF函数 公式： ...