题型:阅读理解 题类:常考题 难易度:普通
河北正定中学2016-2017学年高一下学期英语第二次月考(期中)考试试卷
What if you arrived home to find it delicious hot meal waiting for you, prepared by your very own kitchen robot? It might sound like science fiction. but professors at the university of Tokyo have taken the first steps toward making that scenario a reality. The team recently introduced a humanoid kitchen robot that can pour and other drinks into cups and serve the m to guests. When teating is over, the robot can also wash the dishes and put them away.
In California, another interesting kitchen robot has been developed, called Readybot. It can pick up objects and either store them in cabinets (橱柜)or put them in the trash. It also carries a separate floor-cleaning robot that can operate by itself. Unlike the Japanese robot, Readybot just looks more like a large box with arms and wheels.
Readybot was created by engineers and designers who established a club called the Readybot Challlenge. They believe that in the future millions of robots will be needed in homes to perform ordinary household tasks. Readybot is just the first step in their plan to create a robot that can do jobs not only in kitchens but in other rooms of homes and in offices as well.
Clearly there are technological difficulties to solve before robots can cook a Complete dinner, and there arc also many safety concerns (忧虑) .Not everyone (especially parents) would be comfortable with the idea of robots in their house, manipulating hot pans and sharp knives. The European Commission recently funded(资助) a project to study these concerns. According to lead researcher Professor Chris Melhuish,“ Enabling robots to work safely with humans is a key need for the future development of robotics.”
These are instructions for making invisible ink using baking soda.
Difficulty: |
Easy |
Time required |
A few minutes |
What you need |
Baking soda Paper Water Light bulb Paintbrush Measuring cup Purple grape juice |
Here's how: |
There are at least two methods of using baking soda as invisible ink. Mix equal amounts of water and baking soda. Use a paintbrush to write a message onto white paper, using the baking soda solution (溶液) as “ink”. Allow the ink to dry. One way to read the message is to hold the paper up to a heat source, such as a light bulb. The baking soda will cause the writing in the paper to turn brown. The second way to read the message is to paint over the paper with purple grape juice. The message will appear in a different color. |
Tips: |
If you are using the heating method, avoid igniting (点燃) the paper. Baking soda and grape juice react with each other in an acid-base (酸碱) reaction, producing a color change in the paper. Grape juice concentrate (浓缩物) results in a more visible color change than regular grape juice. |
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