完形填空。从A,B,C,D中选出一个最佳答案,使短文的意思完整 Once there was a rich man in a village . He never gave anything to help others. The 1 didn't like him . One day he said to them . “ I know you don't like me . I will give everything I have to you 2 I die. Then everyone will be happy. ” But nobody believed him . The rich man couldn't 3 why they didn't believe him. One day he went for a 4 by the lake . Under a tree he happened to hear a pig and a cow 5 . The pig said to the cow , “ why everybody likes you an17.在一定的温度下,向一密闭容器中放入 1mol A 和 1mol B,发生下列反应:A(g)+B(g)?C(g)+2D(g),达到平衡状态时,C的含量为 m%,保持温度和体积不变,若按照下列配比在上述容器放入起始物质,达到平衡状态时C的含量仍然为m%的是( )A.2mol A+1mol BB.1mol C+1mol DC.2mol C+2mol DD.0.5mol A+0.5mol B+0.5mol C+1mol D