Dear
Lv 4
Dear 發問時間: 社會與文化語言 · 9 年前

英文選擇一題,請解說,謝謝!!!

AM radio signals differ from FM signals _____ are based on amplification modulation rather than frequency modulation.

A in that

B that they in

C in that they

D that in

答案為c

為何,請說明謝謝

2 個解答

評分
  • 1314
    Lv 6
    9 年前
    最佳解答

    AM radio signals differ from FM signals _____ are based on amplification modulation rather than frequency modulation.A in that

    B that they in

    C in that they

    D that in 調幅信號和調頻信號不同, 原因在於調幅是以振幅調制為基礎而非頻率調制.in that =because(因為)

    they 指的是 AM radio signals

    所以選C

    參考資料: me
  • 9 年前

    因為they是主詞,are前面要有主詞

    參考資料: 5
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