首页
登录
职称英语
[audioFiles]2016m8x/audio_ezfj_ezflisteningd_201607_185[/audioFiles] The Imp
[audioFiles]2016m8x/audio_ezfj_ezflisteningd_201607_185[/audioFiles] The Imp
游客
2023-11-01
34
管理
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. /
In addition to calcium, Vitamin D is important / because it helps the body absorb and retain calcium in the bones, making them strong. / Similarly, sufficient exercise is now seen as another vital factor / in maintaining healthy bone structure and density. / Concerns have been voiced that a lack of exercise in growing children / will have a detrimental effect on their bones. /
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
钙的重要性
钙是一种矿物质,有助于坚固骨骼和牙齿,并调节肌肉收缩。牛奶和其他乳制品是钙的重要来源。在20~25岁之前,补充钙质可以促进骨骼的发育。否则,随着年龄的增长,骨骼会变得越来越脆弱,并引发各种骨骼疾病。
转载请注明原文地址:http://tihaiku.com/zcyy/3148971.html
相关试题推荐
[audioFiles]2015m6x/audio_ezfm_113_20154[/audioFiles]Hi
[audioFiles]2015m6x/audio_ezfm_014_20154[/audioFiles]
[audioFiles]2015m6x/audio_ezfm_101_20154[/audioFiles]
[audioFiles]2015m6x/audio_ezfm_039_20154[/audioFiles]
[audioFiles]2015m6x/audio_ezfm_077_20154[/audioFiles]
[audioFiles]2015m6x/audio_ezfm_001_20154[/audioFiles]
[audioFiles]2015m7s/audio_ezfj_20155_007[/audioFiles]
[audioFiles]2015m7s/audio_ezfj_20155_006[/audioFiles]
[audioFiles]2015m7s/audio_ezfj_20155_003[/audioFiles]
[audioFiles]2015m7s/audio_ezfj_20155_002[/audioFiles]
随机试题
【1】[br]【6】[originaltext]SARAH:John,I’vejusthadsomegoodnews.Susanhas
大自然对人的恩赐,无论贫富,一律平等。所以人们对于大自然,全都一致并深深地依赖着。尤其在乡间,上千年来人们一直以不变的方式生活着。种植庄稼和葡萄,酿酒和
InfantmortalityintheUnitedStatesishigherthan16othernations,
[originaltext]M:Doyoufeellikegoingtothecinema,Liz?W:Ohyes,let’sdo
[originaltext]Mostpeoplefeellonelysometimes,butitusuallyonlylasts
关于资产收益率和净资产收益率,以下表述错误的是()A.资产收益率高,说明企业有较
房地产经纪机构向房地产交易主体宣传相关法律法规,解说交易程序及相关规定,警示不规
下列不属于调剂室一线工作岗位的是A.调剂室处方统计B.调剂室收方划价C.调剂室配
下列活动中,具有正的外部性的是( )。A.工厂排放污染物 B.工厂支付排污费
地基处理的对象是不良地基或软土地基,这些地基的主要问题是()。 A.承载力及
最新回复
(
0
)