题目

You may say it’s just a slip of the tongue. But as a senior official and a well-educated person, a professional who is supposed to be expert at using words shouldn’t have made such a remark like “Why did only two teachers commit suicide?” We use “only” to emphasize（强调） how small an amount is or how unimportant the matter is. When talking about death toll, such a word as “only” should never be appropriate. Of course, it seems unfair to put all the blame on her, especially about the suicide of any individual. We should never indirectly encourage any self-destructive beha16．下列说法正确的是（　　）A．原子是最小的粒子B．氧化物是指含氧元素的物质C．只含有一种元素的物质一定不是化合物D．质子数相同的粒子一定属于同种元素的原子