A company in Atlanta，US，developed a self－cleaning paint modeled on the lotus (荷花)leaf. When the paint dries，it becomes bumpy (不平的)，just like the lotus leaf. Rain drops form on the bumps and roll off，carrying dirt along with them.

　　Nature has done billions of years of research. Only the best－designed products have survived. Companies owe Mother Nature a debt for all that hard work，says Benyus.

　　For scientists and inventors, the possibilities for copying nature are limitless. Technology may never be as efficient as nature, or as colorful. But that doesn’t mean we should stop trying to learn from the world around us. Take a walk outside. Watch a squirrel climb up a tree. Look closely at the veins (纹理)of a leaf. Hear the birds chirping in the trees. Such small details may help solve big problems in the future.

　　28．Which is TRUE according to the passage?

　　A． In America a self－cleaning paint was modeled on the lotus flower.

　　B． Zimbabwe engineers learned from termites to create highly advanced heating systems.

　　C． After the boxfish，many other ideas of new products are borrowed from nature.

　　D． Nature is a good source to turn to for improving technology.

　　29．The clumsy－looking boxfish interested the scientists because of the following reasons EXCEPT that________.

　　A． it swims using little energy

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