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【单选题】
鸟类起源于爬行动物，关于鸟类起源的假说中，恐龙起源假说认为（ ）A.
鸟类起源于槽齿类
B.
鸟类起源于鸟臀目恐龙
C.
鸟类起源于兽脚类恐龙
D.
鸟类起源于始祖鸟
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皮皮学刷刷变学霸
举一反三
【单选题】What do we know about the Student Leadership Meeting?
A.
It was first held in 2004.
B.
It is held every three years.
C.
lt provides free meals for students.
D.
It invites students from Manhattan.
【简答题】名词解释：金属的力学性能
【简答题】名词解释: 金属的力学性能 强度 刚度 塑性
【单选题】I met Julia the other day.It was the first time we each other since we graduated from school.
A.
saw
B.
had seen
C.
did see
D.
have seen
【单选题】《素问·阴阳应象大论》“清阳出上窍，浊阴出下窍”的“浊阴”指的是（）
A.
粪便和尿液
B.
水道中的阴液
C.
化生的精血津液
D.
浓厚的营养物质
E.
痰饮等病理产物
【简答题】解释以下名词:1.金属的力学性能 2. 强度 3. 塑性 4. 硬度 5. 韧性 6. 疲劳强度
【简答题】It was four o'clock when we left Micatlan,and we traveled quickly until it became almost completely dark.It was our intention to return to our general quarters in Atlacomulco that night.We had a long ...
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