某同学制作了图1所示的装置:风吹动时,风车带动磁体上方的线圈转动(线圈两端引出线上的绝缘漆已全部刮掉),灵敏电流计的指针会发生偏转.图2是该同学设计的另一种由轻质材料制成的风车模型,则下列说法正确的是( )
A:该装置是利用电流磁效应工作的
B:该装置的工作原理与电动机相同
C:若图1中电流计换成干电池,则无风吹时,线圈能持续转动
D:若用图2所示风车模型替换图1中风车,则有风吹时,电流计指针也能发生偏转
This morning Jenny, Linda, Mary, Alice and Sally found five bags. Jenny found a brown bag in Classroom 208. In the bag is ____. Linda found a purple bag in Classroom 306.In the bag is ____. Mary found a green bag in Classroom 409.In the bag is ____.Alice found a red bag ____.In the bag is a yellow pencil. Sally found a blue bag ____.In the age is a watch.
自1789年到2003年,美国总统共用了1484次常规否决,国会推翻的否决为106次,大约有7.5%的总统否决被国会推翻。这表明( )