AM radio signals differ from FM signals \_\_\_\_ are based on amplification modulation rather than frequency modulation.
Ain that
Bthat they in
Cin that they正確答案
Dthat in
答案與詳解
為什麼答案是 C
「in that」引導說明差異的子句，「they」作為子句主詞指代前方的 AM radio signals，語法與語意皆正確。
載入中…
