The electronic components of a contemporary electronic system are mainly ( ). A: IC chips B: Transistors C: Field effect transistors D: Integrated operational amplifiers

Transistors are particularly useful for the radios but they are not used in TV sets.

Moore's law means _____. A: The power of integrated transistors on a chip doubles every year, and so does its computing power. B: The power of integrated transistors on a chip doubles every two years, and so does its computing power. C: The power of integrated transistors on a chip doubles every 18 months, and so does its computing power; D: The power of integrated transistors on a chip doubles every six months, and so does its computing power.

Researchers have used to create high speed switches that the backward role of these waves. A: silicon transistors（硅晶体管），speed（加速） B: silicon transistors（硅晶体管）， halt（阻止） C: cellular base（蜂窝基站），halt（阻止） D: cellular base（蜂窝基站），speed（加速）