【简答题】Suppose you want to buy a house. It is important to look 11 before you buy a house. First, decide how many rooms you want. Then decide where you want to live--in the country, in the suburb, or in the ...
【简答题】Vitamin D is important for health and 11 . It is used by the body to form strong bones and teeth. That is why growing children need it. Vitamin D is called the 12 vitamin. It forms when the skin is ba...