A．relatedB．reportedC．requestedD．repeated
A. related
B. reported
C. requested
D. repeated
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生物膜像分子筛一样对大分子不能通过，对小分子能以较高的速度通过。()
A. 正确
B. 错误
A．Its students can spend the whole summer at school.B．It can offer foundation courses
A. Its students can spend the whole summer at school.
B. It can offer foundation courses as well as advanced degrees.
C. It has established study centers all over the world.
D. It is the most important part of the British educational system.
A．maintenanceB．managementC．acquaintanceD．abuse
A. maintenance
B. management
C. acquaintance
D. abuse
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
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