一个梯形的上下底之和是2.8米,高是1.5米,面积是______.
2.8×1.5÷2
=4.2÷2
=2.1(平方米)
答:面积是2.1平方米.
故答案为:2.1平方米.
--- What do you think of the standard of the new curriculum(课程)?
--- It is certain to have a great _______ upon the future of both teachers and students.
A.result
B.effect
C.effort
D.affect
以下程序的输出结果是 void reverse(int a[],int n) int i,t; for(i=0;i<n/2;i++)t=a[i];a[i]=a[n-1-i];a[n-1-i]=t; main( ) int b[10]=1,2,3,4,5,6,7,8,9,10;int i,s=0; reverse(b,8); for(i=6;i<10;i++)s+=b[i]; printf("%d\n",s);
A) 22 B) 10 C) 34 D) 30