题目内容：

Not aii of the dinosaurs were dangerous的意思是?有4个选项
A none of the dinosaurs were dangerous B all of the dinosaurs were not dangerous C few of the dinosaurs were dangerous D no dinosaurs were dangerous

优质解答

原句是：并不是所有的恐龙是危险的,是部分否定
c符合,ABD是全部否定或肯定,不符.