单选题设函数f(x)在连续，其一阶导函数除x=a外都存在，并且其一阶导函数的图形如下图所示，则f(x)

单选题设D是由直线x=-1，y=1与曲线y=x3围成的平面区域，D1是D在第一象限的部分，则等于

单选题3, k, 2, 8, m, 3 The arithmetic mean of the list of numbers above is 4. If k and m are integers and k≠m, what is the median of the list? (A) 2 (B) 2.5 (C) 3 (D) 3.5 (E) 4

单选题[2016年12月]x 2 +y 2 一ax一by+c=0与x轴相切。则能确定c的值。 (1)已知a的值； (2)已知b的值。

单选题Divorce is the act by which a valid marriage is dissolved, usually freeing the parties to remarry. In regions in (1) ancient (2) authority still predominates, divorce may be (3) and rare, especially when, as among Roman Catholics and Hindus, the religious (4) views marriage (5) indissoluble. Custom, (6) , may make divorce a simple matter in (7) societies. (8) some Pueblo Indian tribes a woman could divorce her husband (9) leaving his moccasins on the doorstep. The (10) of individual determination and mutual (11) are making divorce (12) acceptable in the (13) parts of the world. Among premodern societies, the rate of marital stability is difficult to (14) (15) the varying definitions of (16) and divorce. It seems to be broadly true (17) wherever divorce is a legal impossibility the wedding is a well-defined event conducted with (18) formality. The (19) principle does not hold true: elaborate marriage ceremonial is quite compatible with high divorce rates. Many anthropologists agree that divorce is generally more permissible in matrilineal societies (20) in patrilineal ones, in which the procreative and sexual rights of the bride are often symbolically transferred to the husband with the payment of bride-price.

单选题与直线x+y-2=0和曲线x 2 +y 2 -12x-12y+54=0都相切

单选题设f(x)=则ff[f(x)]等于______．A．0B．1

单选题四个不同的小球放人编号为1，2，3，4的四个盒中，则恰有一个空盒的放法共有( )。

单选题用五种不同颜色给下图中的四个区域涂色，每一个区域涂一种颜色，且要求相邻(有公共边)的区域不同色，那么不同的涂色方法有()．

单选题设3阶矩阵A=(α1，α2，α3)，已知|A|=5，|2α1+α2-α3，-α1+2α2，α2+α3|为{{U}} {{/U}}． A. 10 B. 20 C. 30 D. 40

单选题某学生在解方程时，误将式中的x+1看成x-1，得出的解为x=1的值和原方程的解应是()。