数学问题但要看的懂英语point A,B have position vectors a and b relative to origin O,where a=4i+3j-2k b=-7i+5j+4k find the angle OAB我翻译不好 大概意思是 矢量A B 有位置矢量a 和 b 和原点有关a=4i+3j-2k b=-7i+5j+4k 求角

数学问题但要看的懂英语point A,B have position vectors a and b relative to origin O,where a=4i+3j-2k b=-7i+5j+4k find the angle OAB我翻译不好 大概意思是 矢量A B 有位置矢量a 和 b 和原点有关a=4i+3j-2k b=-7i+5j+4k 求角 32.若有语句int *point,a=4;和point=&a;下面均代表地址的一组选项是（ ）A.a,point,*&a B.&*a ,&a ,*point C.*&point,*point,&a D.&a ,&*point ,point 9．若有语句int *point,a=4;和point=&a;下面均代表地址的一组选项是_____.A.a,point,*&a B.&*a,&a,*point C.*&point,*point,&a D.&a,&*point ,point 英语非谓语的小问题There _ obviously no point in saying; we left the meeting.There _ obviously no point in saying, so we left the meeting.There _ obviously no point in saying,and we left the meeting.A.being B.was请问and ,so ,以及;的作 继续是一道数学英语混合的题~20.The points A,B,C,D,and E lie along the number line above.Which of the following could represent the result when the coordinate of point A is multiplied by the square of the coordinate of point B (A) A(B) B(C 若有语句int *point, a=4; 和point=&a; 下面均代表地址的一组选项是(d)a)a,point,*&a b)&*a,&a,*point c)*&point,*point,&a d)&a,&*point ,point&*a,*&point,&*point 都是什么意思? (a+b+c)3-a3-b3-c3分解因式 但要看的懂 java由三点求三角形的周长public class Point {int x;int y;Point(){ }Point(int a,int b){x=a;y=b;}}public class Triangle {Point n1,n2,n3;Triangle(Point n1,Point n2,Point n3){n1=new Point();n2=new Point();n3=new Point();}double x1=Math.pow(n1.x- 2．若有语句int *point,a=4;和point=&a;下面均代表地址的一组选项是_____.a)a,point,*&a b)&*a,&a,*point2．若有语句int *point,a=4;和point=&a;下面均代表地址的一组选项是_____.a)a,point,*&a b)&*a,&a,*pointc)*&point,*point 会英语的请回答 一道有关圆的问题a)THE vertical line x+2=o touches the circle at point A(-2,4) the circle passes though the origin O and the point B(7,1) find the equation of the circle b)write down the coordinates of the centre of the x a.to the point b.beside the point c.off the point d.on the point 英语的定语从句请教Finally,Lin Tao refused to apologize to the girl for his rudeness,_____ she decided to leave.A.at which point D.in which point 想问这两个选项的区别 到底怎么看 具体点 The case in point is that ,a case in point is that ,是不是都可以啊?英语要注意太多的细节! 关于英语语法的问题,请帮忙看下下面的句子语法有没问题,特别是逗号后面要不要加to?感觉这句字有语法问题,但又不知道怎么改,build和adjust 前要不要加to ,还是用ing形式?Point out the method to solv 英语单词point的问题point能作同位语吗? 数学集合问题,求解释题目中附有答案,但本人看不明白,就只好求助于各位兄弟姐妹了!1、设集合A=[-3/4∏,∏],B=[-1,1],f:x→x表示把集合A到集合B的映射,则在映射f下,象1/2的原象有（ ）个答案：32 point towards和point at 的区别.最好再说说point 的其他用法.分不是问题.要多少给多少. 数学问题,需要说明理由一平面内三条直线a、b、c,如果a⊥b,b∥c,则a和c的位置关系是 ( )A、平行 B、垂直 C、相交但不垂直 D、重合