职称英语理工A类阅读理解题精讲9
发布时间：2013/8/22 14:43:55 来源：城市网学院 编辑：admin
练习：
1.What is true for metamaterials?
A.They will always remain in science fiction.
B.They are already a reality.
C.They are nonexistent in nature.
D.Scientists begin to use them to build invisible cloaks.
2.A hyperlens is a more powerful tool than a traditional lens
A.as it can allow scientists to see small things.
B.as it can help photographers to capture images far away.
C. even if it is made of ordinary materials.
D.as it can help scientists to see even the wavelengths of visible light.
3.Scientists at the Polytechnic University of Valencia try to invent
A.an acoustic cloak that can shuffle waves of light.
B.an invisible cloak that can shuffle waves of sound.
C.an acoustic cloak that can shuffle waves of sound.
D.a cloak that is made of materials found in nature.
4.According to Sanchez-Dehesa，
A.it is of great possibility to build an acoustic cloak soon.
B.it is possible to build an acoustic cloak in theory but far from reality.
C.it is totally impossible to build an acoustic cloak.
D.it is theoretically impractical to build an acoustic cloak.
5.What ways are some scientists looking into to protect the island and oil rig from tsunamis?
(Read the last paragraph.)
A.Surround them with metamaterials as protective shields.
B.Stopping the tsunami with metamaterials hours before it reaches them.
C.Building them with larger metamaterials to keep away tsunamis.
D.Using the equipment made of metamaterials to forecast arrival of a tsunami.
