Experts have found that normal sleep can be divided into five_____stages.
举一反三
- Writing a cause-and-effect essay can be divided into 3 stages：pre-writing, while-writing and after-writing.
- The culinary map of China can be divided into five main regions.
- The process of perception can be divided into three stages: __________________________, __________________________, __________________________. （提示：请按顺序填写三个阶段）
- The process of perception can be divided into three stages: __________________________, __________________________, __________________________. (按顺序填写，无需大写首字母）
- Experts have found that these differences are reflected in the that children use language whiley play.