A:0.32
B:0.16
C:0.08
D:0.04
将函数y=sin2x的图象向左平移π4个单位, 再向上平移1个单位,所得图象的函数解析式是( ).
Many airlines now allow passengers to print their boarding passes online ______ their valuable time.
下列人类活动有利于保护生物多样性的是( )
用公式法解3x2﹣7x+1=0的正确结果是( )