皮皮学，免费搜题
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【单选题】
正常骨髓象的骨髓有核细胞增生程度为A.
极度活跃
B.
明显活跃
C.
活跃
D.
低下
E.
极度低下
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【简答题】数据之间的差异程度或频数分布的分散程度称为（ ）。
【单选题】One of the main problems was making sure that the grass had enough water each day to stay______________.
A.
health
B.
healthy
【单选题】I would like to use this opportunity to ___ my commitment to making sure that the work of the World Health Organization will have a positive and lasting impact on the health of women.
A.
underlie
B.
underline
C.
understate
D.
undertake
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