Q19:
Marconi’s conception of the radio was as a substitute for the telephone, a tool for private conversation; instead, it is precisely the opposite, a tool for communicating with a large, public audience.
- Marconi’s conception of the radio was as a substitute for the telephone, a tool for private conversation; instead, it is
- Marconi conceived of the radio as a substitute for the telephone, a tool for private conversation, but which is
- Marconi conceived of the radio as a tool for private conversation that could substitute for the telephone; instead, it has become
- Marconi conceived of the radio to be a tool for private conversation, a substitute for the telephone, which has become
- Marconi conceived of the radio to be a substitute for the telephone, a tool for private conversation, other than what it is,
请问E中的it is 指代什么东东呢 |