从二里头文化开始,中华文明进入新纪元,中国历史进入了一个崭新阶段。
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秦汉两个统一封建王朝的建立,开创并奠定了此后两千多年中国历史发展的基本政治格局。
A. 对
B. 错
Because he was being so kind and concerned, I ______ down and cried into tears.
A. fell
B. broke
C. collapsed
D. cracked
You can learn from their successes -- and mistakes -- as well as ______ up a few tips and tricks along the way.
A. acquire
B. obtain
C. gain
D. pick
I was disappointed to miss Bryan, who had just packed and ______ out.
A. departed
B. left
C. checked
D. fled