无论对儿童、青少年还是老年,钙的作用都是重要的。人体中最大的

无论对儿童、青少年还是老年,钙的作用都是重要的。人体中最大的钙库是(   )

A.小肠           B.骨            C.皮肤            D.肌肉

答案

B

相关题目

将某多肽(分子式为C55H70O19N10)彻底水解后,得到下列4种氨基
将某多肽(分子式为C55H70O19N10)彻底水解后,得到下列4种氨基酸(R基均不含氮元素):谷氨酸(C5H9NO4),苯丙氨酸(C9H11NO2),甘氨酸(C2H5NO2),丙氨酸(C3H7NO2)。问
如图所示,由均匀的电阻丝组成的等边三角形导体框,垂直
如图所示,由均匀的电阻丝组成的等边三角形导体框,垂直磁场放置,将AB两点接入电压恒定的电源两端,通电时,线框受到的安培力为F,若将AB边移走
I was in my early 20s when I discovered the truth about the perfect Christmas t
I was in my early 20s when I discovered the truth about the perfect Christmas trees my sister and I found each year in the forest behind my grandparents’ farmhouse. When we were  41  , Mary and
有机化合物从结构上有二种分类方法:一是按照        
有机化合物从结构上有二种分类方法:一是按照                        来分类;二是按反映有机化合物特性的                   
糖类和脂质是细胞中两种重要的有机物,下列相关叙述错误
糖类和脂质是细胞中两种重要的有机物,下列相关叙述错误的是( ) A.细胞膜上的脂质包括磷脂、胆固醇等 B.果糖和麦芽糖均具有还原性 C.淀粉和
下列化学用语正确的是 A.NaCl的电子式:        B.乙烯
下列化学用语正确的是 A.NaCl的电子式:        B.乙烯的结构简式:CH2CH2 C.Mg原子结构示意图:     D.硫酸铁的电离方程式 Fe2(SO4)3 = 2Fe2+ + 3SO
 He’s making __________ great progress in his lessons that everyone else in
 He’s making __________ great progress in his lessons that everyone else in his class can’t believe it. A. so                            B. very            
There is a wonderful story about a young girl who had no family and no one to l
There is a wonderful story about a young girl who had no family and no one to love her. One day, feeling very sad and lonely, she was walking through a grassland when she noticed a small butterfly c

最新题目