Which of the following is not the feature of semiconductor: ( )
A: Huge physical size.
B: It can be direct pumping by low-power electric current.
C: The semiconductor-based manufacturing technology, which lends itself
to mass production.
D: The compatibility of its output beam dimensions
with those of typical silicabased optical fibers.
A: Huge physical size.
B: It can be direct pumping by low-power electric current.
C: The semiconductor-based manufacturing technology, which lends itself
to mass production.
D: The compatibility of its output beam dimensions
with those of typical silicabased optical fibers.
举一反三
- Semiconductor<br/>with a current is placed in a magnetic field perpendicular to the<br/>current and it induced electric field in the direction. This<br/>phenomenon is known as the ______ .
- Which of the following is NOT a typical feature of Modernism?
- 中国大学MOOC:"Power Conversion Efficiency=Optical output power / Electric input power";
- The function of direct current regulated power supply is to input an alternating current power of 220volts, so that it can output __________.( ) A: alternating current 200 volts voltage B: direct current 24 volts voltage C: direct current 200 volts voltage D: alternating current 24 volts voltage
- Among the following, which is not a typical feature of moving goods by air?