函数f(x)=x3﹣ax2﹣bx+a2在x=1处有极值10,则点(a,b)为____
-- What do you like doing after class?
-- I like not only reading painting.
近代江苏某书记载:“迩来我国服用人造丝织品者亦渐增多,纺制人造丝之厂固所鲜见,即织人造丝布者亦寥寥无几。致人造丝织品进口数量逐步增加,其速度殊可惊骇。”这实质上反映了