The process of software development doesn’t include（ ）．

A．verification function

B．writing code

C．management function

D．validation function

Φ0.4mm一般用途热镀锌低碳钢丝均匀性试验，试样浸入硫酸铜溶液的时间为（）秒。

A.30

B.45

C.60

D.90