题目内容
Common stock car be distinguished from preferred stock by its feature of______.
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Yesterday evening. I went out for a walk with my mother. On the way. we met a foreigner (外国人). He asked me the way to the Hot Spring Hotel. I told him to walk along the mad and take the third turning on the left. then he could see the hotel. He thanked me for my help. I was happy that I could help him.
The writer and his mother went out for a walk.
用凝聚法制备微囊时要应用到甲醛，甲醛的作用为（）
属于妊娠忌用药的是（）
棱术是什么药的处方合写（）
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