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【单选题】
女性，28岁，已婚，未生育。现停经50天，有少量阴道流血，无早孕反应。妇科检查：闭，子宫如孕大小，软，双附件（-）。最可能的诊断是A.
难免流产
B.
过期流产
C.
先兆流产
D.
不全流产
E.
习惯流产
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举一反三
【多选题】What did Einstein and Edison have in common?
A.
They faced immense obstacles and extreme criticism
B.
They were called “slow to learn” and written off as idiots by their teachers.
C.
They overcame their childhood persecution and went on to achieve magnificent discoveries.
D.
Their parents believed in them and worked intensely with their sons.
【简答题】低碳钢试样的应力一应变曲线可以大致分为4个阶段。阶段I为( )阶段;阶段II为( )阶段;阶段III为( )阶段;阶段IV为( )阶段。
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