多项选择题(多选)如下各项中可以考虑采用萃取分离的有() A、混合物为很稀的溶液; B、混合物中含有热敏性物质; C、混合物存在分相; D、混合物中各组分挥发生差异很小。
单项选择题What of the followings is not the main concerns for Australia and New Zealand as claimants to the territory of Antarctica? ( ) A. Fisheries B. Defence strategies C. Ocean Currents D. Scientific activities