Is there any difference between approve and approve of?

any and any other are different because its like every and every other, get it?

'any difficulties' is plural, 'any difficulty' is not. e.g. 'difficulties' represents more than one problem, 'difficulty' represents one

Yes; in electronics, the former is used to regulate voltage levels while modulators combine frequencies for the purpose of data transmission.

Of course there is a big difference between accounts and finance. when we talk about accounts its more about recording and judging the results from every possible angle. and when its finance it talks...

A definition of 'Competence': "Demonstrating the knowledge, skills, experience, and attributes necessary to carry out a defined function effectively." A definition of 'Competency': "The...