2. 外语
  3. The Importance of Calcium Calcium is a mineral that helps build strong bones and teeth and regulates muscle contraction. / M

The Importance of Calcium Calcium is a mineral that helps build strong bones and teeth and regulates muscle contraction. / M

admin2017-05-09  62
问题  
选项
答案 The Importance of Calcium Calcium is a mineral that helps build strong bones and teeth and regulates muscle contraction. / Milk and dairy products have long been held as an important source of calcium. /Calcium can continue strengthening your bones / until the age of 20 to 25 when peak bone mass is reached. / After this point, your bones can only maintain or lose their density / and grow weaker as a natural part of the ageing process. / Inadequate dietary calcium intake before this age / can increase the risk of brittle bone disease, / as calcium is drawn from the bones as a reserve. /
解析
转载请注明原文地址:https://kaotiyun.com/show/XKJK777K
0

专业英语四级

相关试题推荐
随机试题
最新回复(0)