【单选题】Compounds have very different appearances from the element of which they are made.
【简答题】An element is made up of but one kind of material.
【单选题】. The UN is _______ countries that want to increase peace.
【简答题】The significance of this clear distinction between the supporting element and the enclosing element is that the latter can be made relatively light and thin .( distinction名→ 动)
【单选题】营养师为张某做了一份食谱,告诉他这是用食物交换份法制作,每份食物的热量都是一样的,只要保持份数不变,在同一类食物表格中可以随意更换,请问一份食物产生的热量是多少kcal
【判断题】填制凭证时,系统自动取当前业务日期为记账凭证填制的日期,不可修改。