When new hairs are replaced,the color or pigment(色素)is also added to them.However,as one ages,this pigment becomes less and less available.At first,hairs will have a limited amount of pigment and they will appear to be grayish in color.In time,they will lose all of their pigment and...
根据第三段提到的At first,__hairs will have a limited amount of pigment and they will appear to be grayish in color. In time, they will lose all of their pigment and will be white. Many things are known to cause graying, and genetics is a very powerful factor可知,色素和基因在头发变白...
At first, hairs will have a limited amount of pigment and they will appear to be grayish in color. In time, they will lose all of their pigment and will be white. Many things are known to cause graying, and genetics is a very powerful factor. If one of your parents turns gray at ...
3.C.细节理解题.本文第三段提到"At first,hairs will have a limited amount of pigment and they will appear to be grayish in color.In time,they will lose all of their pigment and will be white.Many things are known to cause graying,and genetics is a very powerful factor."由此可以看出,...
本文第三段提到“At first,hairs will have a limited amount of pigment and they will appear to be grayish in color.In time,they will lose all of their pigment and will be white.Many things are known to cause graying,and genetics is a very powerful factor.”由此可以看出,色素和基因在头发...
When new hairs are replaced,the color or pigment (色素) is also added to them.However,as one ages,this pigment becomes less and less available.At first,hairs will have a limited amount of pigment and they will appear to be grayish in color.In time,they will lose all of their pigment ...
Atfirst , hairs willhave a limitedamount of pigment and they will appear to begrayish in color1 . In time , they will lose allof theirpigment and will be white . Many things are known to cause graying . and genetics is a very powerful factor . If one of your parents turnsgray at ...
At first, hairs will have a limited amount of pigment and they will appear to be grayish in color. In time, they will lose all of their pigment and will be white. Many things are known to cause graying, and genetics is a very powerful factor. If one of your parents turns gray at ...
hairs will have a limited amount of pigment and they will appear to be grayish in color.In time , they will lose all of their pigment and will be white.Many things are known to cause graying , and genetics is a very powerful factor. ”由此可以看出,色素和基因在头发变白的过程中起着重要...
When new hairs are replaced, the color or pigment(色素)is also added to them.However, as one ages, this pigment becomes less and less available.At first, hairs will have a limited amount of pigment and they will appear to be grayish in color.In time, they will lose all of their pigme...