some pesticides like DDT have been forbidden in most countries because of the damage they cause to people and the environment.As for chemical fertilisers,crops grown with them usually grow too fast to be rich in nutrition.They may look beautiful on the outside,but inside there is u...
some pesticides like DDT have been prohibited in most countries because of the damage they cause to people and the environment.As for chemical fertilisers,crops grown with them usually grow too fast to be rich in nutrition.They may look beautiful on the outside,but inside there i...
lies in the different function each performs. A pesticide is a chemical substance that is used to kill, control, or repel pests, including mammals, fish, and insects. As the name implies, an insecticide affects only insects. This means that an insecticide is a subgroup of pesticides.
A. Chemical pesticides. B. Traditional farming methods. C. Genetic engineering. D. Limited irrigation. 相关知识点: 试题来源: 解析 C。中文解析:文章中明确提到“One of the major innovations is genetic engineering.”,农业中生物技术的主要创新之一是基因工程。反馈...
百度试题 结果1 题目What is the most widely used method for pest control in modern agriculture? A. Chemical pesticides B. Biological control C. Mechanical control D. Cultural control 相关知识点: 试题来源: 解析 A 反馈 收藏
i.e pulling hoses. It also includes the maintenance and servicing of equipment that may have chemical residues. 2) Pesticide trainers do not need to be licensed; however, this person must have experience with pesticides and be familiar with pesticide laws and regulations. Many school districts ...
Avanafil occurs as white crystalline powder, molecular formula C23H26ClN7O3 and molecular weight of 483.95 and is slightly soluble in ethanol, practically insoluble in water, soluble in 0.1 mol/L hydrochloric acid. STENDRA, for oral administration, is supplied as oval, pale yellow tablets ...
Questions & Answers: What You Need to Know About Wood Pressure Treated with Chromated Copper Arsenate (CCA) | Pesticides | EPA CCA is used to prevent wood decay on decks, fences and playground equipment. The EPA recommends precautions to be taken when working with CCA. OOPP Us Epa 被引量:...
The scientific study of matter's characteristics and behaviour is known as chemistry.andare different from the normal vocabulary. It is a branch of natural science that examines the building blocks of matter, including the atoms, molecules, and ions that make up compounds and their composition, ...
A. The use of chemical fertilizers in agriculture. B. The burning of fossil fuels in various sectors. C. The discharge of domestic sewage. D. The overuse of pesticides in farming. 相关知识点: 试题来源: 解析 B。解析:文章明确提到空气 污染主要是由工业、发电厂和车辆中煤炭、石油和天然气等化...