一种聚联乙炔细胞膜识别器已问世，它是通过物理力把类似于细胞膜上具有分子识别功能的物质镶嵌到聚联乙炔囊泡中，组装成纳米尺寸的生物传感器。它在接触到细菌、病毒时可以发生颜色变化，可用于检测细菌、病毒。这类被镶嵌进去的物质很可能含有( )
A. 磷脂和蛋白质
B. 多糖和蛋白质
C. 胆固醇和多糖
D. 胆固醇和蛋白质
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Our new director is much younger than his ______ , who is already 50 years old.
A. successor
B. precedent
C. predecessor
D. offspring
It is important for specialists to be able to travel because ______.
A. there are so many people working in similar fields
B. there is a lot of social unrest at universities
C. their follow experts are scattered round the world
D. their laboratories are in remote places
After two years he received the certificate of the college for ______ in chemistry.
A. proficiency
B. diversion
C. immersion
D. involvement
成语“分崩离析”出自( )
A. 《谏逐客书》
B. 《寡人之于国也》
C. 《季氏将伐颛臾》
D. 《秋水》
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