① F=<imgwidth="42"height="34"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj03997.png">M(0,5,6)
② F=A<imgwidth="22"height="24"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj031033.png">B<imgwidth="22"height="24"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj031057.png">C
③ F=A<imgwidth="22"height="24"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj031086.png">B<imgwidth="22"height="24"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj031110.png">C+<imgwidth="20"height="27"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj031135.png">B