题目内容

Use ______ constructively as a time for tidying up.

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Recommendations for how to be safe in the sun

阅读以下说明和C程序代码，将程序补充完整。
[说明]
下面C程序代码的功能是：对于输入的一个正整数n(100≤n＜1000)，先判断其是否是回文数(正读反读都一样的数)。若不是，则将n与其反序数相加，再判断得到的和数是否为回文数，若还不是，再将该和数与其反序数相加并进行判断，依此类推，直到得到一个回文数为止。例如，278不是回文数，其反序数为872，相加后得到的1150还不是回文数，再将1150与其反序数511相加，得到的1661是回文数。
函数int isPalm(long m)的功能是：将正整数m的各位数字取出存入数组中，然后判断其是否为回文数。若m是回文数则返回1，否则返回0。
[C程序代码]
include＜stdio.h＞
include＜stdlib.h＞
int isPalm(long m)
{
int i=0, k=0;
char str[32];
while(m＞0) {
str[k++]= ___ +'0';
m=m/10;
}
for(i=0; i＜k/2; i++)
if(str[i]!=str _ )return 0;
return 1;
}
int main()
{
long n, a, t;
printf("input a positive integer: "); scanf("%ld", &n);
if(n＜100||n＞=1000)return -1;
while(_ ) {
printf("%id-＞", n);
for(a=0, t=n; t＞0; ){
a= _ *10+t%10; t=t/10;
n= _____ ;
printf("%id\n", n);
system("pause"); return 0;

听力原文：Woman: Good morning. Garden Hotel. May I help you？
Man: Good morning. I'd like to book a single room with shower, please.
Woman: Yes. When are you arriving？
Man: I'll arrive on the afternoon of July 16. Can you tell me what time I have to check out on July 20？
Woman: Checking out time is mid-day, sir. Do you prefer a room overlooking the street or the garden？
Man: A room overlooking the garden, please.
Woman: One moment please. Yes, we have a single room available on that date. Can I have your name, sir？
Man: You just write down my company's name, Sunshine Company. Can you tell me the price, please？
Woman: For each night that's $100, bed and breakfast. Can I have your fax number, please？
Man: My fax number is 020—5648899．
Woman: Thank you. I'll send a fax to confirm the booking. Goodbye.
Man: Goodbye.
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请帮忙给出每个问题的正确答案和分析，谢谢！

简述人类劳动的本质特征及简述劳动创造了人。