A:①②
B:②③
C:③④
D:①④
____ 具有一定的体积,液体的体积是可以改变的。
如图,已知:在平行四边形ABCD中,点E、F、G、H分别在边AB、BC、CD、DA上,AE=CG,AH=CF,且EG平分∠HEF.
—Michael was late for Mr. Smith's chemistry class this morning.
—________? As far as I know, he never came late to class.