How to Kill Bad Insects Chemical Methods These solutions to insect problems are often not worthwhile because: a) They are effect

admin2022-09-09  71

问题                  How to Kill Bad Insects
Chemical Methods
These solutions to insect problems are often not worthwhile because:
a) They are effective on a【L36】________.
b) They can bring harm to【L37】________.
c) Insects become【L38】________to the chemicals quickly.
Biological Methods
These Methods are【L39】________than chemical methods of eliminating harmful insects.
Breeding Control Methods
In order to control the breeding of insects, one needs to understand the insects’【L40】________.
【L40】

选项

答案life cycle

解析 本题询问要控制害虫的繁殖,人们需要对昆虫的哪些信息进行了解。录音原文中指出人们必须要了解昆虫的生命周期(life circle)。must have an understanding与题目的needs to understand为同义表述,故空格处可直接填写life cycle。
转载请注明原文地址:https://kaotiyun.com/show/3QnD777K
0

相关试题推荐
随机试题
最新回复(0)