ÌâÄ¿ÒªÇóµÄ¡£)
1¡¢ÒÑÖª¼¯ºÏ £¬¼¯ºÏ £¬Ôò £¨ £©
A£® B£® C£® D£®
2¡¢ÔÚÖ±½Ç×ø±êϵÖУ¬Ö±Ïß µÄÇãб½ÇÊÇ£¨ £©
A£® B£® C£® D£®
3.ÒÑÖªA(2,0,1),B(1,-3,1),µãMÔÚxÖáÉÏ£¬ÇÒµ½A¡¢BÁ½µãµÄ¾àÀëÏàµÈ,ÔòMµÄ×ø±êΪ( )
A. (-3,0,0£© B.(0,-3,0) C.(0,0,-3) D. (0,0,3)
4.ÒÑÖªº¯Êý £¬Ôò