题目内容：

阅读下面的短文，在标有序号的空白处填入一个适当的词或用括号中词的适当形式填空。

The skin is  1.    essential part of your body and its largest organ. You have three

 l 2.   of skin which act as a barrier　3.　disease , poisons and the sun’s harmful rays. The functions of your skin are also very 4.　: it keeps you warm or cool; it5.　your body from losing too much water; it is __6.__ you feel cold , heat or pain and it gives you your 7.　of touch. So as you can imagine, if your skin gets _8.__  it can be very serious. First aid is a very important 9.　step in the treatment of burns . You can get burned by a variety of things. There are three types of burns, 10. (depend) on which layers of the skin are burned.