函数y=sinx的最小正周期为:2π,所以函数y=|sinx|的最小正周期是:π.
故选B.
They ______ speaking English at the English corner to improve their spoken English. [ ]
A. stopped
B. practiced
C. finished
D. forgot
280年,三国归晋,再度统一。“三国”是指()。
A.东汉
B.魏
C.蜀
D.吴