《环境空气质量标准》中,以下污染物项目未规定年平均浓度限值的是()。
A.SO2
B.PM10
C.NO2
D.CO
参考答案:D
根据汉语提示,写出各单词的正确形式,每空一词
1. On our school fashion show, Daniel looks smart and _________ (时髦的).
2. It is only 40 minutes from my home to school by _________(地铁).
3. My brother is a _________ (厨师), he is good at cooking.
4. I think _________ (任何人) will like this kind of trousers.
5. Kitty _________ (也) likes computer games.
有下列程序: int fun(int n) if(n==1)return 1; else return(n+fun(n-1)); main() int x; scanf("%d",&x);x=fun(x);printf("%d\n",x); 执行程序时,给变量x输入10,程序的输出结果是( )。
A.55 B.54 C.65 D.45