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【单选题】
肝硬化合并腹水患者腹腔穿刺时，每次放腹水在A.
1000～2000ml
B.
2000～4000ml
C.
3000～5000ml
D.
4000～6000ml
E.
5000～6000ml
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【简答题】Edward rose early on the New-year morning. He looked in every room and wished a Happy New Year to his family. Then he ran into the street to repeat that to those he might meet. When he came back, his ...
【单选题】He ran back into the room to see if he ______ anything behind.
A.
has forgotten
B.
had forgotten
C.
has left
D.
had left
【简答题】He ran back into the room to see if he (leave) _______ something behind.
【简答题】Edward rose early on the New-year morning. He looked in every room and wished a Happy New Year to his family. Then he ran into the street to repeat that to those he might meet. When he came back, his ...
【简答题】请利用上一次实验的数据,对X,Y两个时间序列的数据进行格兰杰因果关系分析。
【单选题】（），又叫伙婚制、亚血缘家庭或普纳路亚家庭，是原始社会蒙昧时期的高级阶段所存在的群体婚姻家庭形态。是指若干数目的姊妹与若干数目的兄弟共同结婚，是同辈分男女之间的集团婚，但是却从两性关系中排除了兄弟姐妹——起初排除了同胞兄弟姐妹，后来又逐步排除了血缘关系较远的兄弟姐妹——间的通婚，因而是群婚制发展的第二阶段，亦是群婚的高级形式。
A.
亚血缘群婚制
B.
对偶婚制
C.
一夫一妻制
D.
族婚制
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