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. Biological control C. Traditional farming methods D. Mechanical weeding 相关知识点: 试题来源: 解析 B。解析:化学农药不是新技术,传统农耕方法也不是新的保护技术,机械除草也不是新的植物保护技术。生物防治是一种新的植物保护技术。反馈...
故选A。(2)细节理解题。根据第三句至第六句These (3)(chemical) easily get into our water supply,and can also have a negative impact on fish and other animals.(4)is worse,eventually they will reach the ocean,where they cause trouble with the marine environment.There are many areas near ...
题目Chemical pesticides and artificial fertilisers have been in widespread use in farming since the middle of the 20th century.When they were first introduced,many farmers welcomed them as a great way to fight crop disease and increase production.Over time,however,what some scientists ha...
Methanol is the basis for important chemical raw materials, chemical products in the world, its output second only to ethylene, propylene and benzene, fourth, widely used in organic intermediates, pharmaceuticals, pesticides, dyes, paints, plastics, synthetic fibers, synthetic rubber, other chemical ...
The first neonicotinoid insecticide introduced to the market was imidacloprid in 1991 followed by several others belonging to the same chemical class and w... R Nauen,I Denholm - 《Archives of Insect Biochemistry & Physiology》 被引量: 1022发表: 2005年 Insect nicotinic acetylcholine receptors (nACh...
Chemical pesticides and artificial fertilisers have been in widespread use in farming since the middle of the 20th century. When they were first introduced, many farmers welcomed them as a great way to fight crop disease and increase production. Over time, however, what some scientists have found...
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
百度试题 结果1 题目句型转换They believe that this illness is associated with the use of chemical pesticides.→They believe that this illness the use of chemical pesticides. 相关知识点: 试题来源: 解析 is linked to 反馈 收藏
1) The first reason is t̶h̶e̶ safety.✕ The first reason is safety. 2) Chemical sprays can kill pests attached to many crops in the fields or farmlands.△OK (より自然そうな文書は...) Chemical sprays/ pesticides kill the pests on farmland crop