单选题：The cache technology _________.
The cache technology _________.@[A](1)
A. is to solve the speed mismatch between CPU and I/O devices, but is not dedicated for that
B. is dedicated to solve the speed mismatch between CPU and I/O devices
C. employs a portion of memory to serve as buffering area
D. defines buffer pool consists of buffer units, each unit consists of a header and a body
A.is to solve the speed mismatch between CPU and I/O devices, but is not dedicated for that
B.is dedicated to solve the speed mismatch between CPU and I/O devices
C.employs a portion of memory to serve as buffering area
D.defines buffer pool consists of buffer units, each unit consists of a header and a body
答案：A
A. is to solve the speed mismatch between CPU and I/O devices, but is not dedicated for that
B. is dedicated to solve the speed mismatch between CPU and I/O devices
C. employs a portion of memory to serve as buffering area
D. defines buffer pool consists of buffer units, each unit consists of a header and a body
A.is to solve the speed mismatch between CPU and I/O devices, but is not dedicated for that
B.is dedicated to solve the speed mismatch between CPU and I/O devices
C.employs a portion of memory to serve as buffering area
D.defines buffer pool consists of buffer units, each unit consists of a header and a body
答案：A