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手术用无影灯下之所以不产生影子主要是因为:


A.光源的面积大
B.光源的面积小
C.光线较强
D.光线较弱

所属分类: 物理 (免费栏目) 浏览量: 117 次


1. There often exits a certain gap between young people and their parents about how to use the money.
2. Some parents lack enough confidence in their children.
3. The major reason why the gap comes to existence is the lack of enough communication between parents and their children.
4. The two generations have a different priority of consideration on many important issues.
5. The young people need to use some stategies when there is a divergence with their parents.

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