泉州荀浯军教器材中标:What’s black and white and read all over?

What’s black and white and read all over? What is black when it`s chean and white when it`s dirty? what's "Mutt and Jef”? what's news and its features what's one and one? what's your hobby and interest What's mp3 , and abover others ? What's utilitarian? And what is retributionist? 脑筋急转弯：If two’s company and three’s crowd,what’s four and five? What is clean when it is black and dirty when it is white?