In our daily life, robots are often found to do work that is too dangerous, boring, difficult, or dirty. And we often see kids play with toy robots.
But what exactly is a robot? There are some important characteristics(特征) that a robot must have. These characteristics might help you to decide what is and what is not a robot. They will also help you to decide what you will need to build into a machine before it can be considered as a robot. A robot has these important characteristics.
Sensing
First of all, your robot would have to be able to sense the environment around it. Give your robot sensors(传感器): light sensors(eyes), touch sensors(hands), chemical sensors(nose), hearing sensors(ears) and taste sensors(tongue).
Movement
A robot needs to be able to move around its environment. It can move on wheels, walk on legs or be driven by small engines(发动机). A robot can move either the whole body or just parts of it.
Energy
A robot needs to be able to power itself. Some robots might power themselves with sunlight, some might with electricity, while others with the battery(电池). The way your robot gets its energy will depend on what your robot needs to do.
Intelligence
A robot needs some kind of "smarts". A programmer is the person who gives the robot its "smarts". The robot will have to have a certain way to receive the program so that it knows what it is to do.
()1. The underlined word "it" in Paragraph 2 is about .
A. the toy B. the characteristic
C. the machine D. the engine
()2. In how many ways can a robot power itself according to the passage?
A. Two. B. Three. C. Four. D. Five.
()3. The underlined word "Intelligence" means "" in Chinese.
A. 能源 B. 勤奋 C. 智能 D. 外观
()4. What is the main purpose of the passage?
A. To help people understand what a robot is.
B. To tell what a robot can do in our life.
C. To describe the movement of a robot.
D. To introduce the history of robots.

C
【短文大意】本文介绍了机器人的一些重要特征。
1. C 【解析】代词指代题。根据上下文可知，it指代前面提到的“a machine”，故选C。
2. B 【解析】细节理解题。根据倒数第二段中的“Some robots might power themselves with sunlight, some might with electricity, while others with the battery.”可知，文中提到了机器人给自己充电的三种方式，故选B。
3. C 【解析】词义猜测题。根据最后一段的描述可知，本段讲的是机器人在智能方面的特征，故选C。
4. A 【解析】推理判断题。本文介绍了机器人的一些重要特征，由此可推知本文的写作目的是“帮助人们了解什么是机器人”，故选A。