安徽省委书记张宝顺推进皖江城市带承接产业转移示范区建设动员大会上强调指出，示范区建设具有探索意义的创新之举，必须主动作为。示范区建设有利（   ）

①形成新的增长极，推动安徽经济加快发展 

②探索承接产业转移的新路子，促进中部地区崛起

③促进东中西良性互动，实现区域协调发展

④加强市场监管在资源配置中的基础性作用

A．①②③

B．①②④

C．①③④

D．②③④

(一) Today our knowledge of food and what it does for our bodies are far more advanced than that of the old times. Now we know about vitamins and how each kind of vitamin helps in the growth of a particular, the food that we eat will take care of our body and so there is no need to take any kinds of vitamins unless our doctor tells us that our bodies are short of something which can be supplied by them. Generally speaking, everything we eat does some good to our body. But if we eat too much of one kind of food and pay too little attention to others, we may have too much of one kind and not enough of others. Then we may be in trouble. We are often told that we must eat some meat at each meal in order to get the necessary proteins. That is only partly true, for proteins are not found only in meat. We can also get them from some vegetables. The best advice about what to eat is that we should eat all kinds of food but never too much of any.

One may take certain vitamins when______

A．one wants to encourage the growth of a particular part of the body

B．one eats all kinds of food

C．one’s health is harmed by the lack of certain things which can be supplied by vitamins

D．one eats well and properly______