A、B的平均数是36,A数是48,B数是______,B数是A数的______%.
36×2-48,
=72-48,
=24,
24÷48=50%,
故答案为:24,50.
After a hard ---fought campaign, Barack Obama won the US presidential election, and became
President of the United States---the first African –American in
country’s history to do so.
A.the; the
B./; /
C./; the
D.the; /
直观判断下列图形惯性矩Iy,Iz的大小关系为:(填>或<号)。
(1)Iy()Iz (2)Iy()Iz (3)Iy()Iz