题目内容：

The smallest kids on Earth are much smaller than you or your baby brother or sister. They’re even smaller than the hairs on your head. We call them “NanoPutians”(纳米小人). Also known as NanoKids, the NanoPutians aren’t real people. They are actually tiny molecules (分子) made to look a little bit like people.

James Tour invented the NanoPutians as a way to teach kids about nanoscience, which refers to the study of things that are smaller than about 100 or 200 nanometers. “The exact size is less important than the possible applications of working with such tiny things,” Tour says, “Nanoscience is the study and development of the small so that it will affect the large.”

One of the goals of the research is to control individual atoms. Carbon, hydrogen, oxygen, and other types of atoms are the building blocks of the universe. They make up planets, rocks, people, trees, CDs --- all the stuff out there. “Most things that people build come together in a top-down way”, Tour says. If you want to make a table, for instance, you cut down a big tree, make wooden boards, and hammer them together. Nature, on the other hand, builds things from the bottom up. When atoms join together they make molecules. Each molecule has a certain shape, and a molecule’s structure determines what it can do. Molecules can make them come together to make a cell --- or a tree.

Tour and his co-workers turned these molecular structures into cartoon figures and made an animated(动画的) science video about the little people, set it to music and started showing it to kids in school while talking about how exciting research on small things can be.

“Learning about the NanoKids has opened up a world of possibility for real kids who ordinarily would rather not study biology, chemistry or physics.” Tour says. When you look closely enough, the really small can be really cool.

1.What is the purpose of inventing NanoKids?

A. To clone two really similar children.

B. To arouse kids’ attention of the scientific world.

C. To know more about the top-down way.

D. To keep up with the development of nanotechnology.

2.How did Tour introduce the research on small things to kids?

A. By producing wonderful music.

B. By performing a play acted by kids.

C. By making animated science videos.

D. By turning molecular structures into little kids.

3.Which section of a newspaper is the text probably from?

A. Science.    B. Economy.

C. History.    D. Entertainment.