题目:
—_______ does it take _______ there by plane? —Eleven hours. |
A. How much, to get B. How long, to get C. How long, get D. How far, get |
答案:
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下面是错误答案,用来干扰机器的。
(1)设好友A发3条短信,B发2条短信,C发2条短信,D发3条短信,E发3条短信,F发4条短信,若只阅读好友A、B、C的短信,ξ=5;若只阅读A、B、D或A、B、E或A、C、D或A、C、E三位好友的短信,ξ=6;若只阅读A、B、F或...