下列哪些措施属于儿童心理卫生服务工作中一级预防的内容（）。 A.社会性宣教 B.优生

现行部颁定额中，压水试验定额适用于固结灌浆和帷幕灌浆检查孔压水试验，固结灌浆压水试验一般采用一个压力点法，试段数量计算公式是（）。

A.孔深×孔数×5%÷5

B.孔深×孔数÷5

C.孔深×孔数×5%

D.孔数×5%

Look, this is the first plane in the world to be created using the new technology of “3D printing”. The airplane was built using only a computer—but it can fly at a speed of 100mph and has a two-meter wingspan.

It was produced using a special nylon laser printer that builds up something layer-by-layer. The parts were made separately and attached using a “snap fit” technique so the aircraft could be put together without tools in minutes.

No fasteners at all were used in the manufacture of the plane. Unmanned and electrically powered, the plane can travel in near silence and is also equipped with a small autopilot system. The special production process used is known as “laser sintering(激光烧结)”and allows the designers to create shapes and structures that would normally include costly manufacturing techniques. This technology allows a highly-tailored aircraft to be developed from your own design to first flight in days, while using traditional materials and techniques would take months. And because no tooling is required for manufacture, major changes to the shape and scale of the aircraft can be made with no extra cost.

Professor Jim Scanlon, who led the team, said, “The process allows the design team to revisit historical techniques and ideas that would have been too expensive using traditional manufacturing.” He added, “This form of structure is very firm and lightweight, but very complex. If it was manufactured traditionally it would require a large number of individually tailored parts that would have to be connected or fastened at great expense.”

The new printed plane is known as the Southampton University Laser Sintered Aircraft—or SULSA for short—and is part of a wider project using cutting-edge manufacturing techniques. The University of Southampton has been at the leading position of Unmanned Aerial Vehicle development since the early 1990s.

小题1:Which of the following would be the best title for the text?

A. Revolutionary Breakthrough of 3D Printer

Scientists Create Aircraft with High Speed

C. New Designed Airplane with New Techniques.

D. The World’s first 3-D printed Airplane, SULSA

小题2:How could the plane work while flying?

A．It should be controlled by an autopilot system.

B．It should be controlled by “laser sintering”.

C．A pilot controls it using a remote control.

D．A pilot with high techniques controlled it.小题3:This kind of plane has the following advantages EXCEPT ______.

A．it produces little noise while flying

B．it is manufactured in quite a short time

C．it only requires simple and cheap tools

D．it needn’t extra cost if changes are made小题4:Professor Jim Scanlon believes they can _____ with their techniques.

A．produce firmer and lighter real planes easily

B．connect and fasten tailor parts for real planes

C．copy earlier planes to study their techniques

D．find differences by studying the traditional ones

关于再测效应影响韦氏智力量表V-P差异的解释，可能是因为( )。

A．一个月之内的第二次测验的总智商会比第一次高
B．再测效应的增分量言语量表比操作量表高
C．一个月之内的第二次测验的总智商不会比第一次高
D．再测效应的增分量操作量表比言语量表高

制定我国教育目的的理论基础是（）。

A.邓 * * 理论

B.社会主义初级阶段理论

C.基础教育课程改革理论

D.马克思关于人的全面发展学说

四喷嘴气化炉的氧气流量调节问题，是投串级好还是自调好？