已知函数f(x)=2x+3,f-1(x)是f(x)的反函数,若mn=16(m,n 发布时间:2017-05-11 14:07 │ 来源:www.tikuol.com 题型:选择题 问题: 已知函数f(x)=2x+3,f-1(x)是f(x)的反函数,若mn=16(m,n∈R+),则f-1(m)+f-1(n)的值为( )A.10B.4C.1D.-2
题型:选择题 关于胸腔闭式引流的叙述中错误的是()。A.衔接紧密,防止漏气B.拔管时患者可自由呼吸C.长玻璃管水柱随呼吸波动,提示引流通畅D.气胸引流管置于患侧第2肋间E.水封瓶液面低于引流管胸腔出口平面60~80cm 查看答案
题型:选择题 Oh, You're back at work? How was your holiday? ()A.We had rain every day and stayed at the hotel most of the time.B.The ten-day holiday was not long enough.C.I was missing you when I was on holiday.D.I heard you were on holiday, too. 查看答案