提取挥发油时宜用()
A.煎煮法
B.分馏法
C.水蒸气蒸馏法
D.盐柝法
E.冷冻法
参考答案:C
解析:挥发油具有挥发性,可以用水蒸气蒸馏法提取。
____ for its well-preserved ancient Tibetan houses, Dukezong was one of the most popular resorts in Shangri-la.
A.Knowing
B.To know
C.To be known
D.Known
下列何种病变与糖尿病无关
A.视神经萎缩
B.白内障
C.虹膜睫状体病变
D.青光眼
E.视网膜剥离