SCIENCE AND TECHNOLOGY ENGLIAH FOR MECHANICAL ENGINEERING a piece of exposition may be regarded as the answer to a question. If a specific question has been asked--"Why are you majoring in chemistry? or What were the causes of the American Revolution? " --it is rather easy to frame an answer that does not waver too badly from the point. The question controls the answer waver from偏离 In a discussion of any length we commonly find more than one question involved. There is the main question, which represents the main interest, but to get a satisfactory answer to that, perhaps other questions must be asked and answered along the way. So we encounter again the problems of unity and coherenceSCIENCE AND TECHNOLOGY ENGLISH FOR MECHANICAL ENGINEERING A piece of exposition may be regarded as the answer to a question. If a specific question has been asked--"Why are you majoring in chemistry? " or "What were the causes of the American Revolution?"--it is rather easy to frame an answer that does not waver too badly from the point. The question controls the answer. In a discussion of any length we commonly find more than one question involved. There is the main question, which represents the main interest, but to get a satisfactory answer to that, perhaps other questions must be asked and answered along the way. So we encounter again the problems of unity and coherence. waver from偏离