矩阵压缩存储的基本思想是:①为多个值相同的元素只分配一个存储空间；②对零元素不分配存储空间。
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稀疏矩阵的压缩存储只存储非零元素，零元素不分配存储空间。
A. 对
B. 错
Which of the following combining form(s) mean(s) vein?
A. ves/o
B. ven/o
C. phren/o
D. phleb/o
Tachycardia is a heart rate that is ____.
The medical term that literally means slow heart is ____.
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