Question

【题目】Scientists claim to have developed a revolutionary new giant 3D concrete printer that can build a 2,500-square-foot house in just 24 hours.

The 3D printer, developed by Professor Behrokh Khoshnevis from the University of Southern California, could be used to build a whole house, layer by layer, in a single day.

"It is basically scaling up 3D printing to the scale of building," said Khoshnevis.

The giant robot replaces construction workers with a nozzle (喷嘴), which can quickly build a home based on a computer pattern, MSN News reported.

Contour Crafting, as it is named, is a layered fabrication (构造) technology. Using this process, a single house or a colony of houses, each with possibly a different design, may be constructed in a single run, embedded (嵌入) in each house all the wires and pipes for electrical, plumbing and air-conditioning.

The potential applications of this technology are far-reaching including in emergency, low-income, and commercial housing.

"Our research also addresses the application of Contour Crafting in building habitats on other planets. Contour Crafting will most probably be one of the very few feasible approaches for building structures on other planets, such as the Moon and Mars, which are being targeted for human habitation before the end of the new century," researchers said on the project website.

The technology may potentially reduce energy use and emissions. And the main advantages of the Contour Crafting process over existing technologies are the superior surface finish that is realized and the greatly increased speed of construction.

【1】Professor Khoshnevis has recently developed a 3D printer that can ________.

A. build a 2500-square-foot house in a single day

B. construct a skyscraper, layer by layer

C. design a group of houses automatically

D. assist construction workers in their work

【2】The new 3D printer uses the following to build a house EXCEPT ________.

A. a nozzle B. a computer pattern C. a robot D. an air-conditioner

【3】According to the text, the potential applications of Contour Crafting include building _______.

A. emergency vehicles B. low-income housing

C. commercial centers D. space stations on other planets

【4】What advantages of this new technology is mentioned in the text?

A. It creates more jobs. B. It is less time-consuming.

C. It saves the building cost. D. It emits no carbon dioxide.

Answer 1

【答案】

【1】A

【2】D

【3】B

【4】C

【解析】这是一篇介绍说明文。文章主要介绍了科学家们开发出的巨型3D混凝土打印技术，这种技术可以在24小时内建造出一幢2500平方英尺的房子。

【1】细节理解题。由第一段“Scientists claim to have developed a revolutionary new giant 3D concrete printer that can build a 2,500-square-foot house in just 24 hours”可知，科学家们宣称已经研制出一种新的3D立体打印机，这种打印机可以在24小时内建造一座2500平方英尺的房子。故A选项正确。

【2】细节理解题。由第四段中的“The giant robot replaces construction workers with a nozzle (喷嘴) , which can quickly build a home based on a computer pattern”可知，这台巨大的机器人用喷嘴代替了建筑工人，以计算机模式为基础，可以快速地建一座房子。故用排除法可知，空调在建房子时并没有被使用。D选项切题。

【3】细节理解题。由第六段中“The potential applications of this technology are far-reaching including in emergency, low-income, and commercial housing”可知，这种新型3D打印机潜在的功能中有一项是可以为低收入人群打造出所需的房子。故B选项正确。

【4】细节理解题。由文章最后一句“And the main advantages of the Contour Crafting process over existing technologies are the superior surface finish that is realized and the greatly increased speed of construction”可知，Contour Crafting程序超过其他现有工艺的最大优点是极好的表面光洁度，同时大幅提升建筑的速度，这会大大节省建筑成本。故C选项正确。