单选题法国大革命期间，吉伦特派掌权后推动革命进一步发展，采取的政策有（　　）

单选题一个棱长为4dm的密封的正方体盒子里(壁厚忽略不计)放有一个半径为1dm的球，若盒子随意翻动，则该盒子的内表面接触不到球的那部分的面积是______dm 2 ．

单选题设A、B两车分别从甲、乙两地同时出发，沿同一公路相向匀速行驶，两车第一次相遇于距甲地20公里处仍继续前行，当分别到达乙、甲两地后立即按原路返回，途中第二次相遇于距乙地10公里处，则甲、乙两地相距( )公里．

单选题=()。

单选题 Battles are like marriages. They have a certain fundamental experience they share in common; they differ infinitely, but still they are all alike. A battle seems to me a conflict of will with death in the same way that a marriage of love is the identification of two human beings to the end of creation of life--as death is the reverse of life, and love of hate. Battles are commitments to cause death as marriages are commitments to create life. Whether, for any individual, either union results in death or in the creation of life, each risks it--and in the risk commits himself. As the servants of death, battles will always remain horrible. Those who are fascinated by them are being fascinated by death. There is no battle aim worthy of the name except that of ending all battles. Any other conception is, literally, suicidal. The fascist worship of battle is a suicidal drive; it is love of death instead of life. In the same idiom, to triumph in battle over the forces which are fighting for death is-- again literally--to triumph over death. It is a surgeon's triumph as he cuts a body and bloodies his hands in removing a cancer in order to triumph over death that is in the body. In these thoughts I have found my own peace, and I return to an army that fights death and cynicism in the name of life and hope. It is a good army. Believe in it.

单选题齐次方程组的基础解系是______。A．(-3，0，1，0)T，(2，-3，0，1)TB．K1(1，-2，1，0)T+K2(2，-3，0，1)C．D．(-3，4，1，-2)T，(3，-5，1，1)T

单选题若，则______。

单选题如图3.1.23所示，两条线段EF、MN将大长方形ABCD分成四个小长方，已知DE=a，AE=b，AN=C，BN=d，且S1的面积为8，S2的面积为6，S3的面积为5，则阴影三角形的面积为()．

单选题若直线ι1，ι2的斜率是方程6x2+x—1=0的两个根，则ι1，ι2的夹角是()．

单选题若L是曲线y=x 3 上从点(1，1)到(-1，-1)的一条连续曲线段，则曲线积分∫ L (e y +y-2)dx+(xe y +x-3y)dy的值为______

单选题已知四元方程组Ax=b的三个解是α1，α2，α3，且α1=(1，1，1，1)T，α2+α3=(3，5，7，9)T，秩r(A)=3，那么，方程组AX=b的通解为______。 A．(1，1，1，1)T+k(1，3，5，7T)(k为任意常数) B．(1，2，4，5)T+k(1，2，1，5)T(k为任意常数) C．(1，1，2，3)T+k(1，2，3，5)T(k为任意常数) D．(1，1，1，2)T+k(2，3，5，7)T(k为任意常数)

单选题设D是圆形区域x2+y2≤4，则二重积分等于()。