【判断题】The term ecotoxicology is used to define the branch of toxicology concerned with the study of the toxic effects of natural and man-made substance on the biotic (living) and abiotic (non-living) compon...
【简答题】Many man-made substances are replacing certain natural materials because either the quantity of the natural products can not meet our ever-increasing requirement, or more often, because the physical p...
【简答题】The subject of this year's Kunming International Expo is "man and nature walking hand in hand into the 21st century. When the UK was asked to take part, it seemed natural to build a garden. Now the Br...
【判断题】The term ecotoxicology is used to define the branch of toxicology concerned with the study of the toxic effects of natural and man-made substance on the biotic (living) and abiotic (non-living) compon...