Many of
the grand challenges of today and the future are found in the question: "How are
we going to solve the problems and make serious improvements in industrial
manufacturing, disease control, environmental pollution control, global climate
change, food production, transportation, communication, and others?"
Nanotechnology (纳米技术) promises to make revolutionary contributions. Within the
next few years we can expect to see major improvements. Here are some
possibilities the things to come. Nanotechnology is
fundamentally changing the way materials and devices will be produced in the
future. Nanostructures, ceramics, polymers, metals, and other materials will
have greatly improved mechanical properties. In fact, with the ability to build
things atom-by-atom and molecule-by-molecule there will be new classes of
structural materials. Nanotechnology will enable products to be lighter,
stronger, smarter, cheaper, cleaner, and more precise. The
ability to synthesize nanoscale budding blocks with precisely controlled size
and composition and then to assemble them into larger structures with unique
properties and functions will revolutionize segments of the materials
manufacturing industry. Nanotechnology is expected to bring about lighter,
stronger, and programmable materials; reductions in life-cycle costs through
lower failure rates; innovative devices based on new principles and
architectures; and use of molecular cluster manufacturing.
Nanotechnology will provide new tools for medicine. It could radically change
the way surgery is done. It will make it possible to do molecular scale surgery
to repair and rearrange cells. Since disease is the result of physical disorder,
misarranged molecules and cells, medicine at this level should be able to cure
most diseases. Mutations in DNA could be repaired and cancer cells, toxic
chemicals, and viruses could be destroyed through use of medical Nan
devices. Nanotechnology enabled increases in computational
power will permit the characterization of macromolecular networks in realistic
environments. Such simulations will be essential elements in the development of
biocompatible implants and in the drug discovery process. Nanotechnology has the
potential to significantly impact energy efficiency, storage, and production.
Nanotechnology can change the economics of energy production.
单选题
The passage deals mainly with ______.
A. grand challenge in manufacturing, medicine and computer industry
B. possibilities of nanotechnology's contributions in the future
C. great changes caused by nanotechnology
D. practical application of nanotechnology
【正确答案】
B
【答案解析】[解析] 这篇文章的大意是：纳米技术对当今和未来的各种挑战将作出巨大的贡献。在未来的几年，在材料、设备、医学、计算机等领域我们有可能目睹这一切。第一段最后一句“Here are some possibilities the things to come”点明了主题。
单选题
According to the passage, which of the following is not right?
A. Nanotechnology will be used to change the structures of materials.
B. Nanotechnology will make an operation more precisely.
C. Nanotechnology will change the properties of materials.
D. Nanotechnology will cure diseases that can't be solved at
present.