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( )
________ entered the classroom ________ the bell rang.
— Did you remember to give Jenny the money? — Yes. ________ I saw her, I’m sure.
______ their homework, these three students have to stay in the classroom for another thirty minutes.
When ________ what made him a popular person, he said it was his personality.
________ its low price, the advantage of this car lies in its good quality.