happy family pupils teacher grandfather
I have a big____.We are very____to get together.My____is a bus driver, He is 70 years old now.My mother is a____.She teaches____in a primary school.
构造如图1所示的图形,在⊙O中,AB是直径,点C在⊙O上,所以∠ACB=90°,作CD⊥AB于D.设∠BAC=α,则sinα= BCAB=13 ,可设BC=x,则AB=3x,….
2017年3月2日下午3点全国政协会议新闻发布会在京举行,在伦敦的华人要想准时观看,需什么时间坐在电视机前( )
以下做法与“食品安全”要求不符的是( )