Modulation is the process of loading low-frequency signals onto high-frequency carriers. ( )
举一反三
- The simple high frequency sinusoidal wave which contains no information of its own is（ ） A: modulation B: general function C: carrier D: transmission
- 高频（High Frequency，HF）的主要特点()
- 智慧职教: 高频（High Frequency，HF）的主要特点（ ）。
- Legal English is characterized by its high frequency of active sentences.
- What part of speech has a high frequency of occurrence in Chinese sentences?