What are “WH-questions”?

What are “WH-questions”?
【正确答案】：”WH-questions” covers all questions that normally begin with WH-series of words, i.e. what, when, where, why, who(m), whose, which and how. Spoken with a final falling tone, they are sometimes called “information questions” because they require some specific information in the reply. They do not query the truth o f the statement, which is typically performed by YES-NO questions; rather, they ask for details about a part of it.