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【单选题】
Some people think Mr. Smith is crazy becauseA.
he is often motivated to change.
B.
he is in the media business.
C.
he often makes unreasonable decisions.
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举一反三
【单选题】Compounds have very different appearances from the element of which they are made.
A.
化合物的形态与构成它们的元素极不相同。
B.
化合物的外表与构成它们的要素极不相同。
C.
化合物的元素与构成它们的形态极不相同。
D.
化合物的形态与构成它们的元素完全相同。
【简答题】微量元素(minor element，microelement，trace element)
【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.
A.
made of
B.
consisted in
C.
made from
D.
made up of
【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
A.
100
B.
60
C.
90
D.
80
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