(702＋108)÷(30×3)=90

    Peeling（削皮）vegetables can be the____boring part of any meal as you spend extra  minutes____prep time. And when you're doing,you____(leave) with a pile of unusable skins ____usually end up in the garbage can.

    But according to health experts,what we throw away is actually one of the healthiest____(part) of our foods.

    Daily Mail Online spoke to Mary Jane Detroyer,a registered dietitian and nutritionist based in New York,about ____we shouldn't be peeling our vegetables and all the hidden benefits____(find) in the skins.

    According to Detroyer,there are several reasons to be leaving the skins on,and the main reason is what you deprive（使丧失）your body of when you peel____off.The skins of produce like potatoes,carrots,and cucumbers all have plenty of health benefits."The skins have a lot of fiber and it's insoluble（不溶性）fiber,especially____the skins are colorful,"Detroyer told Daily Mail Online.“Most of the time,____majority of the vegetable's nutrients are in the skins.”

 下列有关化学反应，对其反应类型的判断，正确的是（　　）

①CuO+2HCl═CuCl₂+H₂O

②3CO+Fe₂O₃2Fe+3CO₂

③Cu+2AgNO₃═Cu（NO₃）₂+2Ag

④C+CO₂​2CO