Hi, everyone. Healthy food and drink____(be)important. I like rice, meat and____(vegetable). Meat is delicious____(连词)it's my favourite. I eat it every day.____(carrot)are my favourite vegetable. They are good____(介词)my eyes. I often drink water.

已知：Cr₂O₇^2- (橙色)+H₂O $\stackrel{}{\rightleftharpoons }$ 2CrO₄^2-(黄色)+2H⁺  △H= +13.8 kJ/mol，+6价铬盐在一定条件下可被还原为Cr³⁺，Cr³⁺在水溶液中为绿色。