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【多选题】
你认为本学期大学物理学习中印象深刻的是什么?A.
学习通在线平台
B.
力学中的分析方法如微元法
C.
场是一种物质及表现
D.
刚体的角动量守恒
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举一反三
【单选题】取24 mL浓度为0.05 mol·L -1 的Na 2 SO 3 溶液，恰好与20 mL浓度为0.02 mol·L -1 的K 2 Cr 2 O 7 溶液完全反应，则元素Cr在被还原的产物中的化合价是
A.
＋6
B.
＋3
C.
＋2
D.
0
【单选题】On Sundays there are a lot of children playing in the park, _parents seated together joking.
A.
their
B.
that
C.
whose
D.
Which
【单选题】on Sundays there are a lot of children playing in the park, _____ parents seated together joking.
A.
their
B.
that
C.
whose
D.
which
【简答题】根据植物对光照的要求可以分成、、三类。
【单选题】On sundays there are a lot of children palying in the park, _______ parents seated together joking.
A.
their
B.
that
C.
whose
D.
which
【单选题】On Sundays there are a lot of children playing in the park, ______ parents sit together joking.
A.
their
B.
whose
C.
which
D.
that
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