AFAX服务器默认保存10天的传真，但可以修改保存天数。

用包括粉体本身孔隙及粒子问孔隙在内的体积计算的密度为（ ）

A．真密度

B．堆密度

C．粒密度

D．高压密度

E．振实密度

Skype融合的两大技术是VOIP和______。

A．C/S

B．IPTV

C．B/S

D．P2P

After years of hearing drivers complain about scratches (划痕) on their cars, Japan’s Nissan Motor Company has officially announced the next big thing--a paint that not only resists scratches and scrapes, but actually repairs itself within a few days.

The new material, developed by Nippon Paint Company, contains an elastic rubbery-like resin (弹性树脂) that is able to heal minor (较小的) marks caused by car wash equipment, parking lot encounters, road debris (石头碎片) or even on-purpose destruction.

The automaker admits its results vary depending on the temperature and the depth of the damage, but adds “this is the only paint like it in the world, and tests prove it works.”

Minor scratches, the most common type, are said to slowly fade over about a week. And once they’re gone, there is no trace (痕迹) that they were ever there.

The special paint is said to last for at least three years after it is first applied, but there is no word yet on whether more can be added after that period.

Nissan claims car washes are the worst offenders for this type of damage, accounting for at least 80 percent of all incidents.

But the complete auto-healing won’t come without scratching your wallet. The vehicle maker notes the special paint adds about $ 100 US to the price of a car.

It plans to use its new chemical mixture only on its X-Trail SUVs in Japan for now, as it looks for a more widespread presentation. And while plans to offer the feature overseas haven’t been made yet, if it’s a hit there, you can be almost sure market forces will drive it to these shores as well.

小题1: From the article, we can find that_______.

A．the paint has already been used on cars by now

B．the paint beats other products of its kind in its lengthy effect

C．car damage is mainly caused by scratches and scrapes

D．marketing this paint in Europe is not under way小题2:The paint used on cars can_________.

A．last 3 years before it is re-applied again

B．fade only in a few days

C．help cars recover from minor paint damage

D．reduce car scrape incidents to 20 percent小题3:What does the underlined part refer to?

A．Certain models of Nissan.

B．Name for one kind of paint.

C．Somewhere in Japan.

D．A word standing for a car-dealer store.小题4: What can be inferred from the article?

A．The paint was developed by Nissan Motor Company.

B．The paint might work better in summer than in winter.

C．The mark on the car could disappear as soon as the paint is applied.

D．The paint is very popular in Japan.

简述项目可行性分析的内容。

连续式加热炉按热工制度或炉膛形状分为（）、（）、（）与（）。