下图为某历史档案馆珍藏的一封“廷寄”。该文物可作为研究我国古代哪一历史问题的重要史料
A.书法风格突变
B.丞相制度变革
C.民间邮驿发展
D.君主权力变化
答案:D
我国每年<5岁儿童肺炎死亡率占世界儿童肺炎死亡率的()
A.10%
B.21%
C.28%
D.35%
E.60%
The owner of the mine was ____________ to twenty years because he had broken the law to employ children as miners.
A.sentenced
B.trapped
C.sheltered
D.buried