萘环上碳原子的编号如(Ⅰ)式,根据系统命名法,(Ⅱ)式可称为2﹣硝基萘,则化合物(Ⅲ)的名称为( )
下列有关农田施肥的说法中,正确的是( )
When they faced such a difficulty, no better plan ____(出现,想出)to them.