【名词&注释】
基本条件(basic condition)、信噪比。、传输率(transfer rate)、二进制位、可表示(can be expressed)、有噪声(noisy)
[单选题]In the system development process,modularity is a very well-established principle used in the______phase.
A. design
B. analysis
C. implementation
D. testing
B. 3 C. 4 D. 6