一个四棱锥和一个三棱锥恰好可以拼接成一个三棱柱.这个四棱锥的底面为正方形,且底面边长与各侧棱长相等,这个三棱锥的底面边长与各侧棱长也都相等.设四棱锥、三棱锥、三棱柱的高分别为,,,则( )
She ______ someone, so I nodded to her and went away.
I'll be out for some time. ______ anything important happens, call me up immediately.
— I hope to take the computer course. — Good idea. ____ more about it, visit this website.
I still remember my happy childhood when my mother ______ take me to Disneyland at weekends.
The manager was satisfied to see many new products ______ after great effort.