写出下列字各属于哪种造字法。
蚂 本 牧 未 牛 清
象形字:____ 指事字:____
会意字:____ 形声字:____
I have a good friend.She is a beautiful girl.She is lovely.She has two big eyes and she's thin.Her favourite colour is red.She likes wearing(穿着)a red dress.She can sing and dance.We often(经常)play together.
在空间直角坐标系中,点(-2,1,4)关于x轴的对称点的坐标为 ( )
比一比,在组词
键 ____爸____
健 ____爷____
下列分离或提纯物质所用的方法不正确的是()