下载APP
举一反三
【单选题】很多国家已停止使用含铊的杀虫剂。元素周期表中铊的数据见右图，下列说法正确的是
A.
TI元素是一种主族元素
B.
TI元素的相对原子质量是204
C.
铊元素的质量数是204.4
D.
TI原子最外层有3个能量相同的电子
【单选题】Many Americans harbor a grossly distorted and exaggerated view of most of the risks surrounding food．Fergus Clydesdale, head of the department of food science and nutrition at the University of Massac...
A.
They overlook the risks of the food they eat.
B.
They overestimate the hazards of their food.
C.
They are overoptimistic about the safety of their food.
D.
They overstate the government's interference with the food industry.
【单选题】Even plants can run a fever, especially when they’re under attack by insects or disease. But unlike humans, plants can have their temperature taken from 3,000 feet away- straight up. A decade ago, ada...
A.
the lack of official support
B.
its high cost
C.
the lack of financial support
D.
its failure to help increase production
相关题目：
【判断题】本课程讲授者认为发明DDT作为杀虫剂获得诺奖是个失误
A.
正确
B.
错误
【单选题】不属于我国自主开发的杀虫剂是：
A.
杀虫双
B.
氯噻啉
C.
环氧虫啶
D.
丁虫腈
E.
氯氰菊酯
【单选题】根据其化学结构，敌敌畏属于有机磷杀虫剂中的（）类杀虫剂
A.
膦酸酯
B.
焦磷酸酯
C.
硫代磷酸酯
D.
磷酸酯
【单选题】很多国家已停止使用含铊的杀虫剂。元素周期表中铊的数据见右图，下列说法正确的是
A.
TI元素是一种主族元素
B.
TI元素的相对原子质量是204
C.
铊元素的质量数是204.4
D.
TI原子最外层有3个能量相同的电子
【单选题】Many Americans harbor a grossly distorted and exaggerated view of most of the risks surrounding food．Fergus Clydesdale, head of the department of food science and nutrition at the University of Massac...
A.
They overlook the risks of the food they eat.
B.
They overestimate the hazards of their food.
C.
They are overoptimistic about the safety of their food.
D.
They overstate the government's interference with the food industry.
【单选题】下面杀虫剂属于蜕皮激素类似物的是
A.
除虫脲
B.
灭幼脲
C.
抑食肼
D.
吡丙醚
【单选题】Even plants can run a fever, especially when they’re under attack by insects or disease. But unlike humans, plants can have their temperature taken from 3,000 feet away- straight up. A decade ago, ada...
A.
the lack of official support
B.
its high cost
C.
the lack of financial support
D.
its failure to help increase production
【单选题】溴氰菊酯的特点是（）
A.
纯品为无色无味结晶粉末
B.
常温下溶于水
C.
在碱性介质中比较稳定，遇酸容易分解
D.
对日光稳定
【单选题】拟除虫菊酯属于（）
A.
胃毒剂
B.
触杀剂
C.
内吸杀虫剂
D.
熏蒸剂
E.
以上都是
【单选题】胺菊酯是()类拟除虫菊酯杀虫剂
A.
菊酯酸
B.
卤代菊酯
C.
环丙烷酸酯
D.
非环羧酸酯
【单选题】乐果属于有机磷杀虫剂分类中的()
A.
剧毒类
B.
高毒类
C.
中毒类
D.
低毒类
【判断题】卫生间每周要对地面喷洒杀虫剂一次，尤其注意对地漏处的喷洒。
A.
正确
B.
错误
【单选题】新烟碱类杀虫剂主要作用于
A.
乙酰胆碱酯酶
B.
丁酰胆碱酯酶
C.
烟碱乙酰胆碱受体
D.
几丁质合成酶
【判断题】增效胺（MGK-2）作为除虫菊素或丙烯菊酯的增效剂，对防制蟑螂特别有效。
A.
正确
B.
错误