【正确答案】正确答案：Questioning is not only the necessary step of discarding the false while retaining the truth in the negative aspect, but also a basic condition in establishing new theories and inspiring new invention in the positive aspect. It is lazy of thought to admit other's word completely without thinking. This kind of people is always playing a passive role without the ability to learn thoughtfully. Only the people who often question and ask others can raise questions. They want to get the answers by raising questions. There is no way for increasing knowledge except constantly asking and answering questions.