上颌尖牙舌面外形高点在哪里()。
A.颈缘处
B.颈嵴处
C.舌隆突处
D.颈1/3与中1/3交界处
E.中l/3处
参考答案:C
点A(-2,6)与点B关于原点O对称,则点B的坐标为( )。
Among so many people at the party, I _______ John, one of my classmates after 20 years.
A.looked up
B.picked out
C.took up
D.brought out