●OS can use （72) memory to run processes that require more main memory than is actually av

● Computer （72) is used to temporarily store data. （72)A. CPU B. disk C. memory D. I／O

●A （73) is a named memory block. By using its name, we can refer to the data stored in the

●The （72) tells the computer what to do.（72)A.disk B.memory C.program D.data

Radiocarbon dating techniques can be used to iden

写出下列原子的光谱基项（基态光谱支项)：（1)Ru（44)；（2)Os（76)。

“The Life That I Have” was originally written by Marks in memory of his girlfriend Ru