Not the microcomputer secondary storage devices is d.

不是微机辅助存储设备的是D。

Physical storage includes primary and secondary storage.

物理存储器包括主存储器和辅助存储器。

Secondary storage, which we shall describe in Chapter 8, does not lose its contents.

二级存储，我们将在第8章描述，并没有失去它的内容。

The typical secondary storage medium of a microcomputer is the floppy and hard disks.

微型计算机的典型的辅助存储介质是软盘和硬盘。

External memory, also known as secondary storage, is extension of the internal memory.

外部存储器，也称辅存，是内存的延伸。