四、信息还原
How do farmers usually kill weeds(杂草)in the fields? Many of them use chemicals(化学品)to kill weeds. The trouble is, these weedkillers also kill wildlife, pollute rivers and are bad for the fields. 1.
D
This kind of robot can cut weedkiller use by 90%. The robot is really smart because it only kills weeds but not crops.
2.
A
Several cameras are built into the robot. The cameras facing the ground take photos to help the robot "see" the plants it passes. The robot compares(对比)each photo to a library of plant photos to decide which plants are weeds. Robot arms move to give a small dose(剂量)of weedkiller to the weeds. The robot is energy-friendly. 3.
C
How the robot will develop
The scientists think that the robot they have made isn't perfect. 4.
F
The improved model of robots will find weeds and dig(挖)them out instead of using weedkillers.
5.
E
They could be designed to leave some harmless weeds in the fields to support wildlife living there.
A. How the robot works
B. Where the robot is used
C. It is powered by the energy from the sun.
D. But scientists have created a farmyard robot.
E. Moreover, new robots will help create a more balanced ecosystem.
F. They're working on the new designs to improve the model.
G. We are very happy that people are paying attention to the ecosystem.
解析:
【分析】
本题为英语信息还原题,需结合上下文逻辑关系匹配句子。首先通读全文,第一段提出传统除草剂的弊端,1处需转折引出解决问题的新事物;第二段详细介绍机器人的工作流程,2处需引出工作原理的相关内容;第三段提到机器人的能源友好特性,3处需补充能源相关信息;第四段指出现有机器人不完美,4处需说明科学家的改进工作;第五段提到对野生动物的作用,5处需递进说明对生态的影响,据此逐一匹配选项。
【解析】
1. 前文阐述传统除草剂的危害,后文提到“这种机器人”,故1处选D(转折引出科学家发明的农场机器人);
2. 后文详细说明机器人的工作流程(摄像头识别、对比照片、喷除草剂),故2处选A(提问机器人如何工作);
3. 前文提到机器人“energy-friendly(能源友好)”,故3处选C(说明其能源来自太阳能);
4. 前文指出机器人“isn't perfect(不完美)”,后文提到“improved model(改进模型)”,故4处选F(说明科学家在改进设计);
5. 后文提到“leave some harmless weeds to support wildlife(留无害杂草支持野生动物)”,故5处选E(递进说明新机器人帮助平衡生态)。
【答案】
DACFE
【知识点】
英语信息还原、篇章逻辑衔接
【点评】
本题考查英语篇章的逻辑衔接能力,需结合上下文语境、句子间的转折、解释、递进等关系匹配内容,是初中英语常见题型,难度适中。
【难度系数】
0.5