Carol picked some strawberries and ____ (take) them home.
— can you hear?
— I can hear a dog.( )
观察下列各数:1,1,57,715,931,…按你发现的规律计算这列数的第7个数为( )
揭开了维新变法运动的序幕( )
把函数y=sin5x-π2的图象向右平移π4个单位,再把所得函数图象上各点的横坐标缩短为原来的12,所得的函数解析式为( )