답변을 얻은 뒤 반드시 감사의 덧글을 남기고, 좋은 답변은 채택해 주시는 센스...
질문할 때 예의를 지키시기 바랍니다.(빨리... 고수분만..... 이런 식의 요구는 자제 바랍니다.)
질문 내용 : 1. As early as 1840, the noted German anatomist, Jacob Henle, identified the existence of infectiousagents that were too small to be observed the ordinary microscope.2. Depending on temperature and snowfall, it can take between 10 to 3,500 year for snow to transform completely ingo glacier ice.