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同一部件，应尽量采用多种材料制作（）For the same component, it should be made from as more types of materials as possible（）
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great efforts should be made to develop new types of medicine
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单选题Which statement is true？（）A
A flow layout can be used to position a component that should resize horizontally when the container is resized.B
A grid layout can be used to position a component tat should maintain a constant size even when the container is resized.C
A border layout can be used to position component that should maintain a constant size even when the container is resized.D
The grid bag layout can be used to give a grid-like layout which differs from the normal grid in that individual rows and columns can have unique sizes.E
If two components are placed in the same column of a grid bag layout， and one component resizes horizontally， then the other component must resize horizontally.
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