Complete the order form. and return it right now.(英译汉)
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如果函数f(x)在区间[a,b]上连续,在(a,b)上可导且导数恒为零,试用微分学方法证明f(x)在(a,b)上一定是一个常数.
肿瘤组织的异型性表现在①_______和②_______两个方面。
On behalf of the management and staff at Deerwood I wish you all the best in your future career.(英译汉)