【多选题】以下药材来源于伞形科且主要成分为挥发油的有
【单选题】佛尔哈德法测定下列哪种物质时,为了防止沉淀转化,需要加入二氯乙烷时?
【简答题】What were the two boats? One was a ______ and the other was a Japanese fishing boat.
【判断题】用语音点外卖这一行为属于开放域聊天。()
【单选题】6 The ball went towards a passing boat. It went _____ of a passing boat.
【简答题】____________(决定取消搜索) when there was no hope of finding the missing boat.
【单选题】The ball went towards a passing boat. It went ______ of a passing boat.
【单选题】— What are the boys doing? — They _______________ in the boat. [ ]