题干
In order to make his dream ____, he worked day and night.
A：come on
B：come out
C：come true
D：come into being
答案(点此获取答案解析）
C
In order to make his dream ____, he worked day and night.
A：come on
B：come out
C：come true
D：come into being
，定义
，如
,
的奇偶性为
．有一块边长为30cm的正方形ABCD飞镖游戏板，假设飞镖投在游戏板上的每一点的机会均等．求下列事件发生的概率：
