phenolic acids contain a single phenyl group substituted by one carboxylic group and one or more OH groups.
举一反三
- There appeared two groups of English Enlighteners. One is the moderate group and the other is the revolutionary group.
- There were two groups of English enlighteners, one is the passive group, the other is the radical group.
- Isogenous group is A: seen at periphery of cartilage B: seen at periphery of bone C: a group of chondrocytes within a single lacuna D: a single chondrocyte within one lacuna E: a group of immature flattened chondrocytes
- Isogenous group is () A: at<br/>periphery of cartilage B: at<br/>periphery of bone C: a group<br/>of chondrocytes within a single lacuna; D: a single<br/>chondrocyte within one lacuna; E: a group<br/>of immature flattened chondrocytes
- Which one of the following groups or countries will NOT take part in climate change negotiations? A: G77 and China B: Environmental Integrity Group C: OECD D: Umbrella Group