A．maintenanceB．managementC．acquaintanceD．abuse
A. maintenance
B. management
C. acquaintance
D. abuse
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假尿苷分子中糖苷键是()。
A. C-N连接
B. C-C 连接
C-O连接
D. N-H连接
America's colleges and universities have ______.
A. cultivated all kinds of work force
B. educated some prominent leaders for the whole world
C. done research only at the cutting edge of science
D. been the backbone of the west world
America's higher education ______.
A. has been experienced for more than 300 hundred years
B. has a system that is the most advanced in the world
C. has a character of variety and has scholarly freedom
D. is central governed and has a tradition of charity
History teaches my grandfather's aunt family that ______.
A. they would be killed by Hitler in their fate
B. Jewish people would be unwelcome in the history
C. my grandfather's aunt was totally wrong
D. they were wrong and they should believe my grandfather's aunt
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