题目内容

Smartphones are the most widely used _______ computers and are designed to fit into the palm of one hand.

A. laptop
B. macro
C. handheld
D. midrange

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_______ are cell phones with wireless connections to the Internet.

A. Midrange devices
B. Superphones
C. Wearables
D. Smartphones

_______ storage devices do not lose data or programs after the electrical power is turned off.

A. Secondary
B. Input/output
C. Primary
D. Communication

_______ use(s) rigid metallic platters to store programs and very large data files.

A. RAM
B. Hard disks
C. ROM
D. Solid-state storage

_______ are secondary storage devices that use laser technology.

A. Hard disks
B. RAM
C. Optical disks
D. ROM