He made a ____ (complain) that the food was too cold.
法国共产党员亨利·巴比塞所著《斯大林传》的俄文译本于1936年出版,定价低廉到只要l卢布,印数则达到30万册。这主要是因为该书旨在( )
在3.14、227、-2、273、π3、0.2020020002这六个数中,无理数有( )
—You mustn't swim here. Look at the sign. It_______ "No swimming".
—Oh, I_______ notice it. Thanks for telling me.
如图,阳光从教室的窗户射入室内,窗户框AB在地面上的影长DE=1.8m,窗户下檐到地面的距离BC=1m,EC=1.2m,那么窗户的高AB为( )