Drag the food that cannot eat together with the food shows at screen to the arrow there.
if correct answer it will shows the reason of cannot eat together.
if wrong then will tell user which is the correct answer.
there is the next button on right side.
user able to continue the questions to test how many knowledge they absorb from the web.
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here are the revise of previous screen layout(not much adjustment)
main page...
sub-menu at bottom: about, fruit, drink, vegetable, seafood, condiment, cereal, meat, laboratory, and gift.