A:y=2sin(2x+ 2π3 )
B:y=2sin(2x+ π3 )
C:y=2sin( x2 ﹣ π3 )
D:y=2sin(2x﹣ π3 )
There is ___________ with him.
Mrs Lee is standing the students, singing an English song.
读课文《十三岁的际遇》,下列属于北大学生特点的是( )