在“天尊地卑,乾坤定矣。卑高以陈,贵贱位矣”中,“陈”之义为()
A.陈旧
B.陈述
C.陈久
D.陈列
参考答案:D
Many students think that teenagers should be ()(允许) to choose their own clothes.
设函数f(x)在[a,b]上可微,f’(a)<0,f’(b)>0,求证:在区间(a,b)内必有一点ξ,使得f’(ξ)=0.