A:couldn't
B:wouldn't
C:shouldn't
D:mightn't
In , Children's Day is in January.
设m=∫-111-x2dx,若将函数fx=sinωx+φ的图像向左平移m个单位后所得图像与原图像重合,则ω的值不可能为( )
列各项中,说明生物需要营养的是( )