A:why you came late
B:why did you come late
C:when you came late
D:when did you come late
已知一个正四面体的棱长为2,则它的体积为____
两篮苹果都是35个,如果从第一篮里拿出5个放入第二篮里,这时第一篮的苹果个数是第二篮的( )