火源不包括（）。
A、明火
B、摩擦、冲击产生的火花
C、雷电产生的火花
D、汽油
参考答案：D
_____ computer games, his parents were very worried about his study.
A．Addicted to
B．He addicted to
C．His addicted to
D．Addicting to
政纪案件的证据有哪几种？
