【单选题】盐酸普鲁卡因与NaNO2试液反应后,再与碱性β—萘酚偶合成猩红色沉淀,是因为( )
【简答题】什么是句式选择?句式选择应遵循什么原则?
【单选题】盐酸普鲁卡因与NaNO2试液反应后,再与碱性β-萘酚偶合成猩红色沉淀,是因为( )。
【单选题】They finally came to a ______ that they would eat it together.
【简答题】They finally ________ all hope of finding the missing dog which they liked so much. [A] gave up [B] gave in [C] gave off [D] gave out
【单选题】After months of a hard voyage on the rough sea, they finally came to _____they called their “promised land”.
【单选题】腓骨头骨折后出现“马蹄内翻足”是哪支神经损伤的特征 ( )