【单选题】新药长期毒性试验,描述错误的是:
D.
啮齿类动物长期毒性试验中组均值的意义通常大于单个动物数据的意义
【简答题】已知函数y=f(x)是偶函数,当x>0时,有 f(x)=x+ 4 x ,且当x∈[-3,-1],f(x)的值域是[n,m],则m-n的值是?
【单选题】Had you prepared for your lecture, you______ more fluently.
【简答题】已知f(x)是奇函数,g(x)=f(x)+4,g(1)=2,则f(-1)的值是______.
【简答题】东巴文字是目前世界唯一存活着的象形文字,成为文字起源和发展的( )。
【判断题】纳西族的东巴象形文字被认为是目前“世界唯一存活着的象形文字”。
【简答题】I'm ashamed _____________ such a thing. [A] that you would have done [B] that you should have done [C] of what you are doing [D] to what you were doing
【单选题】已知函数 f ( x ) = cos 2 x - 4 sin x 则函数 f ( x )的最大值是
【单选题】There was a lot of fun at the party. You ________, but why didn't you? [ ]