Preheat oven to 400 degrees F (200 degrees C). Lightly grease a 15x10x2-inch baking pan.
Whisk flour, cornmeal, sugar, baking powder, and salt together in a bowl; stir in milk, vegetable oil, and eggs until batter is evenly combined. Pour batter into prepared baking dish.
Bake in the preheated oven until a toothpick inserted in the center of the loaf comes out clean, about 33 minutes.
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