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
（ ）
A． |
B． |
C． |
D． |
相关试题
Theexpression on her face suggested she waswhen she heard the news .
A amazing; amazed B. amazed; amazing
C. amazed; amazed D. amazing; amazing
You shouldn’t go out without a coat , it’s rather cold .
| A．unless | B．even though | C．however | D．since |
When ____ different cultures, we often p
ay attention only to the differenced without noticing the many similarities.
| A．compared | B．being compared | C．comparing | D．having compared |
we should exploit the Antarctic’s natural resources is open to discussion.
| A．What | B．Whether | C．If | D．That |
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