题干
________she walked, she dropped the seeds along the road so that she would know the way back.
A：As
B：While
C：When
D：After
答案(点此获取答案解析）
A
________she walked, she dropped the seeds along the road so that she would know the way back.
A：As
B：While
C：When
D：After
K2S4＋3KI。装置(Ⅱ)为电解池的示意图。当闭合开关K时，X附近溶液先变红。则下列说法正确的是