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Home xin The plastic packaging box of frozen food sold in the supermarket is usually white, and some geometric concave convex grooves are pressed at the bottom of the box, which is mainly for

The plastic packaging box of frozen food sold in the supermarket is usually white, and some geometric concave convex grooves are pressed at the bottom of the box, which is mainly for

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(1) the color of opaque objects is determined by the light reflected by them. White objects can reflect all kinds of colored light and have strong reflection on light. At the same time, the heat absorption capacity of white objects is weak. Therefore, the plastic bags and packaging boxes for frozen food sold in supermarkets usually use white.
(2) the plastic mechanical strength used to make packaging boxes is not strong, In order to prevent the breakage and damage of the packing box, some geometric patterns are often pressed at the bottom of the box to increase the mechanical strength of the packing box. According to the above analysis, a is correct and BCD is wrong.
therefore, A.

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