问题:下面由正方体堆成,数一数,填空:5q9S0}(@
5q9S0}(@
(1)按层数:第一层有4Q7p0F个正方体,第二层有;{'P5J0j个,第三层有+n4G;R.N2\个;5q9S0}(@
(2)按排数:前排有-|,Z-B1G+i个正方体,后排有:T9P,M0D*?(o0p8r7I;s7J,l'k个.5q9S0}(@
(3)一共有2^,b/K1E5}/s4~3^5d8K'A*v/e个正方体.5q9S0}(@