热值低的火花塞称为冷型火花塞。（ ）
A. 对
B. 错
Software is the set of that tell a computer what to do.
A. tools
B. rules
C. symbols
D. instructions
Software can be categorized into two types: and.
A. bundled software,office software
B. package software,custom software
C. system software,application software
D. freeware software,public-domain software
When you fun your computer, will be started first.
A. operation system
B. system software
C. office software
D. application software
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