就要考了,请教思路! 多谢!
举报
there are 5 colors left....each of them u can choose "use" or "not use", so the answer is
2(choose or not)*2*2*2*2=2^5
明白了. 非常感谢!
发表回复
手机版|ChaseDream|GMT+8, 2025-6-25 10:30 京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
ChaseDream 论坛
© 2003-2025 ChaseDream.com. All Rights Reserved.