The sound-carrying medium may be matter in any state. 下划线介词短语充当_______。
定语
举一反三
- A circuit may be defined as a path for current flow. 前后两个下划线介词短语分别充当_______。
- The resistance of the load is too high for the amplifier. 前后两个下划线介词短语分别充当_______。
- These transistor circuits can amplify voltage signals with minimum waveform distortion. 下划线介词短语充当_______。
- Alternating current as a source of power has certain advantages over direct current. 前后两个下划线介词短语分别充当_______。
- 中国大学MOOC: The resistance of the load （负载）is too high for the amplifier（放大器）. 前后两个下划线介词短语分别充当_______。
内容
- 0
介词短语不能充当谓语，介词不能成为谓语中心。
- 1
中国大学MOOC: These transistor（晶体管） circuits can amplify（放大） voltage signals with minimum waveform distortion（波形失真）. 下划线介词短语充当_______。
- 2
介词短语可以充当主语或谓语。（)
- 3
介词同名词组成介词短语后也可以充当谓语。
- 4
中国大学MOOC: Alternating current（交流电） as a source of power has certain advantages over direct current（直流电）. 前后两个下划线介词短语分别充当_______。