[单选题]All data are stored in stacked semiconductor dynamic RAM memory boards; the information recorded，the（）rate，and the order in which the data are stored differ.

正确答案 ：C

sampling

[单选题]空调器制冷系统的心脏是()，制冷剂的循环流动都靠它实现。

正确答案 ：A

压缩机

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