普通教育学的研究对象主要是( )。
A．幼儿教育 B．中、小学教育 C．高等教育 D．职业技术教育
参考答案：B
根据提示将句子补充完整。
1. I like (这个) sweater. I don't like (那个) sweater.
2. A bicycle is (较慢的) than a car.
3. This is a ticket Beijing Shijiazhuang. (从北京到石家庄)
4. Please don't (跳). Please (站) beside the train.
5. We (到达) in Beijing on February first in the afternoon.
6. They live in the (美国). They speak (英语).
简述恒星的形成。
