挑战习题
1/3单选题
难度:

1.用0,1,2,3,组成没有重复数字的四位数其中偶数有__________个。
A 8
B 10
C 5
D 6
提示1:
IOi/memHjDDmmK/nibnmrornmoTlhYPntKDvvIww5LiN6IO95Zyo5Y2D5L2N44CC5b2T5pyr5bC+5pWw5a2X5pivMOeahOaXtuWAme+8jOWJqeS9meeahDPkuKrlhYPntKDlhajmjpLliJfvvIzmraTml7bmnIk8aW1nIHdpZHRoPTQxIGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzRDL0ZFL3JCQUNFMU4xN18zU1lUTkNBQUFCcXJBZ0V6NDgwNy5wbmciPuS4quWBtuaVsA==
提示2:
IOWmguaenDLlnKjmnKvlsL7mlbDvvIzpgqPkuYgw5pyJMuenjemAieaLqe+8jOWJqeS9meeahOS4pOS4quaVsOaciTLnp43pgInmi6nvvIzov5nnp43mg4XlhrXkuIvvvIzmnIk05Liq5YG25pWw44CC5YWx5pyJNis0PTEw5Liq5YG25pWw
正确答案:Qg==
6Kej77ya6L+Z6YeMMOaYr+eJueauiueahOWFg+e0oO+8jDDkuI3og73lnKjljYPkvY3jgILlvZPmnKvlsL7mlbDlrZfmmK8w55qE5pe25YCZ77yM5Ymp5L2Z55qEM+S4quWFg+e0oOWFqOaOkuWIl++8jOatpOaXtuaciTxpbWcgd2lkdGg9NDEgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNEMvRkUvckJBQ0UxTjE3XzNTWVROQ0FBQUJxckFnRXo0ODA3LnBuZyI+5Liq5YG25pWw77yM5aaC5p6cMuWcqOacq+WwvuaVsO+8jOmCo+S5iDDmnIky56eN6YCJ5oup77yM5Ymp5L2Z55qE5Lik5Liq5pWw5pyJMuenjemAieaLqe+8jOi/meenjeaDheWGteS4i++8jOaciTTkuKrlgbbmlbDjgILlhbHmnIk2KzQ9MTDkuKrlgbbmlbDjgII=