The Dujiangyan Irrigation System was built in _____________.
A、Qin Dynasty
B、Zhou Dynasty
C、Song Dynasty
D、Han Dynasty

单项选择题Getcurmin () mod 10 and getcursec()=0. The event defines the time function for full10 minutes A、right B、wrong C、uncertain D、The above is wrong.

单项选择题护理心理学研究任务不包括()。