During the summer holiday, my grandparents went to China. First they flew to Beijing from London. Then they went to Guangzhou by train.

    When they wentto my home, I wanted to help my grandpa carry his heavy bag, but he did himself.  They bought many presents for us.  I got a dress.  My brother got a toy plane. They brought many dried fruits for us, which they grew by themselves. My grandparents are farmers. They are hard-working people.

读课文《平分生命》，回答问题。

If it is all smoky，cover your mouth and nose，crawl out very fast.

如图，把一根导线放在小磁针上方，比较甲乙两图可以得到的结论是：____；比较甲丙两图可以得到的结论是：____。