用尺规画∠AOB的角平分线的步骤是: ①以O为圆心,适当长为半径作弧,交OA于M点,交OB于N点; ②分别以M、N为圆心,大于的长为半径作弧,两弧在∠AOB的内部相交于点C; ③过点C作射线OC, 射线OC就是∠AOB的角平分线.这样作角平分线的根据是 ( ) A.SSS B.SAS C.ASA D. AASThe foreign guests ,____ by some artists , came out of the hall . A . following B . to follow C .followed D .to be followed