摘要： Just as sound travels through the air in waves, electricity travels through the air in radio waves. A. what is called B. which is called C. what it is called D. which it is called
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Just as sound travels through the air in waves, electricity travels through the air in ______ radio waves.
A. what is called B. which is called C. what it is called D. which it is called
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Just as sound travels through the air in waves, electricity travels through the air in ______ radio waves.
- A.what is called
- B.which is called
- C.what it is called
- D.which it is called
Just as sound travels through the air in waves, electricity travels through the air in ______ radio waves.
| A．what is called | B．which is called | C．what it is called | D．which it is called |