1£®ÓöàÓñíµÄÅ·Ä·µ²(R×1 k)¼ì²éÐÔÄÜÁ¼ºÃµÄ¾§Ìå¶þ¼«¹Ü£¬·¢ÏÖ¶àÓõç±íµÄ±íÕëÏòÓÒƫתµÄ½Ç¶ÈºÜС£¬Õâ˵Ã÷(¡¡¡¡)

A£®¶þ¼«¹Ü¼ÓÓÐÕýÏòµçѹ£¬¹Ê²âµÃµç×èºÜС

B£®¶þ¼«¹Ü¼ÓÓз´Ïòµçѹ£¬¹Ê²âµÃµç×èºÜ´ó

C£®´Ëʱºì±í±Ê½ÓµÄÊǶþ¼«¹ÜµÄÕý¼«

D£®´Ëʱºì±í±Ê½ÓµÄÊǶþ¼«¹ÜµÄ¸º¼«

½âÎö£ºÑ¡BC.¶àÓõç±íµÄ±íÕëÏòÓÒƫתµÄ½Ç¶ÈºÜС£¬ËµÃ÷µç×èºÜ´ó£¬¶þ¼«¹Ü¼ÓÓз´Ïòµçѹ£¬Ñ¡ÏîA´íÎó£¬BÕýÈ·£®Å·Ä·µ²µÄºÚ±í±ÊΪµçÔ´µÄÕý¼«£¬ºì±í±ÊΪµçÔ´µÄ¸º¼«£¬Ö»Óкì±í±Ê½Ó¶þ¼«¹ÜµÄÕý¼«Ê±²Å»áʹ¶þ¼«¹Ü·´½Ó£¬ËùÒÔÑ¡ÏîCÕýÈ·£¬D´íÎó£®