小学生必背的英语单词 foot脚 head头 face脸 hair头发 nose鼻子mouth嘴eye眼睛 ear耳朵 arm手臂 hand手 finger手指leg腿tail尾巴red红 blue蓝 yellow黄 green绿 white白black黑purple紫 orange橙 brown棕pen钢笔 pencil铅笔 pencil-case铅笔盒 ruler尺子 book书bag包comic book漫画书 post card明信片 newspaper报纸schoolbag书包 eras