大家都和着他的节拍唱了起来。(　 )

一个小于30的自然数，既是8的倍数，又是12的倍数，这个数是多少?

两金属棒和三根电阻丝如图连接，虚线框内存在均匀变化的匀强磁场，三根电阻丝的电阻大小之比R₁：R₂：R₃=3：2：1，金属棒电阻不计．当S₁、S₂闭合，S₃断开时，闭合的回路中感应电流为I，当S₂、S₃闭合，S₁断开时，闭合的回路中感应电流为5I，当S₁、S₃闭合，S₂断开时，闭合的回路中感应电流是（   ）

设f（x）=log_ax（a＞0，a≠1）．若f（x₁x₂…x₂₀₁₇）=6，则f（x₁³）+f（x₂³）+…+f（x₂₀₁₇³）=（   ）

根据短文内容和所给中文提示，写出空白处各单词的正确形式。每空限填一词。
    Season Two of Where Are We going, Dad?, a show on Hunan TV, is even more ____(令人兴奋的) than the first.
    Huang Lei— a director，actor，singer and teacher, is a good father. He couldn't be more ____(耐心的) and had to ____(惩罚) Duoduo, his daughter for making some ____(错误) when he takes care of her. As a smart father, Lu Yi certainly knows how to look ____(有帮助的). His daughter Bei'er is a ____(明智的) child who behaves well. And Yang Wei has showed his quiet side. And Yang's good life ____(技能) make it quite easy for him to look after his son on his own. And Yang Yangyang is a good ____(例子) of the saying, "Like father, like son". Malaysian singer Gary Chaw certainly knows how to get along with his ____(孩子们)，Joe and Grace, the brother and sister are sweet. The family laugh and cry ____(一起) and share their most unforgettable moments with each other.