My favourite holiday is the Spring Festival. It's the Chinese New Year. For the Spring Festival,we buy new clothes,clean the doors,the windows and the floors. And we make dumplings. Kids get lucky money. That's int
书包里放有语文、数学、英语、生物、历史5本教科书,从中任意抽取2本,则抽取的2本中其中一本是数学教科书的情况有( )种。
读“俄罗斯略图”,回答下列问题。
His brother____ ____ ____ ____in the PE test.