Few people I know seem to have much desire or time to cook. Making Chinese ____(dish) is seen as especially troublesome. Many westerners ____ come to China cook much less than in their own countries once they realize how cheap ____ can be to eat out. I still remember ____ (visit) a friend who'd lived here for five years and I ____(shock) when I learned she hadn't cooked once in all that time.

    While regularly eating out seems to ____(become) common for many young people in recent years, it's not without a cost. The obvious one is money; eating out once or twice a week may be ____(afford) but doing this most days adds up. There could be an even ____ (high) cost on your health. Researchers have found that there is a direct link between the increase in food eaten outside the home and the rise in____(weigh) problems.

    If you are not going to suffer this problem, then I suggest that the next time you go to your mum's home ____ dinner, get a few cooking tips from her. Cooking food can be fun. You might also begin to notice the effects not only on your health but in your pocket.

锌﹣溴蓄电池的充、放电的电池总反应为Zn+Br₂Zn²⁺+2Br^﹣，下列各反应：①Zn﹣2e^﹣=Zn²⁺；②Br₂+2e^﹣=2Br^﹣；③2Br^﹣﹣2e^﹣=Br₂；④Zn²⁺+2e^﹣=Zn，其中充电的阳极和放电的负极的反应分别是（　　）