测定食品中人工合成着色剂,首先在酸性条件下用下列哪种物质吸附食品中的着色剂()。
A. 氧化铝
B. 硅胶
C. 聚酰胺粉
D. 羧甲基纤维素
E. 硅镁吸附剂
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发现于南京西善桥南朝墓的砖印壁画《竹林七贤与荣启期图》,是一件具有突出表现“魏晋风度”的作品。
A. 正确
B. 错误
教育诚信监督评价体系的组织构建是该体系整体构建的核心部分,用以指派日后该体系各项事务运行工作的实施者和管理者,明确各方面的责任与权限。
A. 正确
B. 错误
Two navigational hazards are located near to each other,but each is marked by an individual cardinal buoyage system. The buoys of one cardinal system may be identified from the other system by().
A. the differing light colors
B. one system having odd numbers while the other system has even numbers
C. one system using horizontal bands while the other system uses vertical stripes
D. the difference in the periods of the light