若右图表示植物细胞渗透作用的图解，下列说法错误的是

把下列词语补充完整。

自相____             无坚____              哄堂____

我国是个多民族国家，下列属于内蒙古自治区民族风俗的是

阅读理解
    Hi. I am Maya. I am 13 years old. I am from Africa. My father is a teacher and my mother works in a hospital. Now they are working in Beijing. They both like their work and work very hard. My father's favorite animal is the panda, but I like dolphins best.
    I am studying in a middle school. And I like music and drawing best. I want to be a designer. I like to design my room. I like the color pink, so there are a lot of pink things in my room.
    I have three friends in my room. They are Mike, Dora and Peter. They are my toys. I love them. Every night, they sleep with me.

要使□18×4 的积是四位数，□里最小可以填（   ）