试说明智能控制研究的数学工具。

5A戒烟法中第一步是（）。

A.评估

B.计划

C.建议

D.帮助

E.询问

专家建议，为预防癌症，应当做到（　　）

①避免接触物理的、化学的、病毒的致癌因子 ②不吸烟、少饮酒，少吃腌制或烧烤的食品  ③多吃绿色蔬菜和水果，多吃粗粮  ④锻炼身体，增强体质  ⑤定期用放射线检查身体（透视、照片）．

A．①②③⑤

B．②③④⑤

C．①②③④

D．①②④⑤

The Book of Life

So far, scientists have named about 1.8 million living species(物种), and that’s just a small number of what probably exists on Earth. With so many plants, animals, and other living things coveting the planet, it can be tough to figure out what type of grass is growing by the roadside or what kind of bird just flew by.

A soon-to-be-started Web site might help. An international team of researchers has announced the creation of Web-based Encyclopedia(百科全书) of Life ( EoL). The project aims to list every species on Earth in a single, easy-to-use reference guide.

To get the encyclopedia started, the creators will use information from scientific databases (数据库) that already exist. And eventually, in special sections of the site, non-scientists with specialized knowledge will come to help. Bird-watchers, for example, will be able to input what birds they’ve seen and where. To make sure the encyclopedia is accurate, scientists will review much of the information added to it.

As the EoL develops, you might find it useful for school projects. The site will feature (以……为特色) special pages for kids who are studying ecosystems in their neighborhoods. Another convenient feature of the EoL is that you’ll be able to pick the level of detail you want to see to match your interests, age, and knowledge.

It now takes years for scientists to collect all the data they need to describe and analyze species. The creators of the Encyclopedia of Life hope that their new tool will speed up that process.

小题1:The Web-based EoL aims to__________ .

A．find out what covers the earth

B．list all living things on Earth

C．work out the number of birds

D．save the existing plants小题2:One characteristic of the EoL is that__________ .

A．it is run by school students

B．it focuses on different types of grass

C．it provides different levels of information

D．it allows non-scientists to review its data小题3:In the last paragraph, "that process" means__________ .

A．analyzing species

B．creating a new tool

C．collecting data

D．describing species

手电钻在可钻材料范围内，根据不同的规格型号，钻孔直径可以在（）mm范围。

A.Φ3~Φ5

B.Φ5~Φ18

C.Φ18~Φ25

D.Φ25以上