在分开到盒及脱出石膏时,均不可用力过大,以免义齿基托折断或_________。
参考答案:支架变形
I prefer to be ______ at a hotel with free room service and access to the Internet.
A.put up
B.set up
C.made up
D.picked up
设函数f(x)在[a,b]上一阶可导,在(a,b)内二阶可导,且f(a)=f(b)=0,f’(a)f’(b)>0.求证: (Ⅰ)
使得f’(ξ)=f(ξ); (Ⅱ)
使得f"(η)=f(η).