A:as far as
B:as high as
C:as well as
D:as good as
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( )
1000____998 75mm____8cm 4m____384cm
当血液由心室泵入动脉时,心脏的心房和心室的舒缩状况是( )