【简答题】分别给出一种检验挥发油、甾体、生物碱、蛋白质的预实验方法。
【单选题】在 Word 2010 编辑状态下,要撤消上一次操作的快捷键是()
【简答题】v. (into,with)( 使 ) 成为一体, ( 使 ) 合并
【简答题】What
is black pudding?A. Something
sweet to eat after breakfast. B. A
hot drink you have before breakfast. C. A
food made from pig’s blood.