清创术，为什么先清创后缝合？

阅读下面短文，简要回答所给问题。

It was near Christmas during my first semester teaching at a new school.I loved my small special class more than any group I had taught in the past.They were hungry for knowledge and I was enjoying teaching.

Other teachers had told me that our children were from poor families and not to expect any child to bring a Christmas gift.In fact，I wasn't expecting any gifts.

Imagine my surprise when every child brought me a gift on the day before our holiday break.First，I got a much­loved stuffed monkey from a shy girl.I was told，“He is my favorite，but I love you and I want him to be with you，Miss Taylor.”How thrilled I was!

Next came a new set of Christmas tree lights that was “missing” from a mother's cupboard.

Finally，I came to one little boy's gift which I had never received.It was an old，dirty and broken Christmas story book.Just when I wanted to express my happiness，I was interrupted(打断)by the giver，“And see，it is new！It still has the price tag.”

When other children laughed at him，I stopped them and said，“Oh，books are good in that way.The story is always new if you have not read it before.Now，let's share one together.”Everyone listened quietly as I read the most wonderful Christmas story of my life.

I still keep those Christmas gifts.They always remind me of my lovely kids.

小题1:Why did the teacher like her small special class?

____________________________________________________

小题2:When did the children bring their teacher gifts?

__________________________________________________________

小题3:Who sent a stuffed monkey to the teacher?

_______________________________________________________

小题4:Was the Christmas story book new?

________________________________________________________

小题5:How did the teacher feel when she got the gifts?

尿频阴虚内热证的证候表现有（）

A.病程短

B.小便频数短赤

C.盗汗心烦

D.手足心热

E.苔少

请补充函数fun()，该函数的功能是判断一个数是否为回文数。当字符串是回文时，函数返回字符申：yes!，否则函数返回字符串：no!，并在主函数中输出。所谓回文即正向与反向的拼写都一样，例如：abcba。
注意：部分源程序给出如下。
请勿改动主函数main和其他函数中的任何内容，仅在函数fun()的横线上填入所编写的若干表达式或语句。
试题程序：
#include＜string.h＞
#include＜stdio.h＞
char *fun(char*str)

char *p1,*p2;
int i, t=0;
p1=str;p2=str+strlen(str)-1;
for (i=0; 【1】 ;i++)
if( 【2】 )

t=1;
break;

if ( 【3】 )
return("yes!");
else
return("no!");
main()

char str[50];
printf("Input;");
scanf("%s",str);
printf("%s\n",fun(str));

语句Y=Y+1的正确含义是( )。

A．变量Y的值与Y+1的值相等

B．将变量Y的值存到Y+1中去

C．将变量Y的值加1后赋值给变量Y

D．变量Y的值为1

腰椎管狭窄的典型临床表现是（）

A.头晕、头痛

B.间歇性跛行

C.感觉障碍

D.下肢无力

E.大小便障碍