【单选题】如图,正方体ABCD-A 1 B 1 C 1 D 1 的棱长为a,那么四棱锥D 1 -ABCD 的体积是 [ ]
【单选题】如图,正方体ABCD-A1B1C1D1,E为棱CC1的中点,如果将正方体的棱长扩大到3倍,则四面体E-A1BD的体积扩大的倍数是( )。
【单选题】电桥电路的输出与电桥的输入()自荐存在非线性关系
【单选题】--- Do you have any idea why the bus – drivers are on strike? --- As far as I know, they are ____a pay rise.
【单选题】--- Do you have any idea why the bus – drivers are on strike? --- As far as I know, they are_____
A.
11.--- Do you have any idea why the bus – drivers are on strike? --- As far as I know, they are_____________a pay rise. A.calling off