— In 1914. We have just learnt it in my history class.
A:break up
B:break out
C:break down
从59°S,沿160°E经线向南发射炮弹,射程90千米,炮弹落点在( )
为得到函数y=cos(2x+π3)的图像,只需将函数y=sin2x的图像( )