Many Chinese universities provide scholarships for students ________financial aid.( )
A:in favour of
B:in honour of
C:in face of
D:in need of
仔细观察甲、乙两图,回答问题
下列符合号表示2个氧原子的是( )
①以点O为圆心,任意长为半径作弧,交OB于点D,交OA于点E;
②分别以点D,E为圆心,以大于 12 DE的长为半径作弧,两弧在∠AOB的内部相交于点C;
③作射线OC.
则射线OC为∠AOB的平分线.
由上述作法可得△OCD≌△OCE的依据是( )