已知列表lst=[ [1,2,3],[4,5,6],[7,8,9] ],则表达式lst[1][1]的值为()
A.1
B.5
C.4
D.[4,5,6]
A.1
B.5
C.4
D.[4,5,6]
已知某黏性不可压缩液体的流速场为,又已知液体的动力黏滞系数μ=0.003N·s/m2,在点(1,2,3)处的应力pyy=2N/m2,试求该点处的其他应力。
A.(0,-2,-2)
B.(11,7,1)
C.(1,2,3)
D.(2,4,5)
如果U={1,2,3,4,5,6},A={1,2,3},B={2,4,6},求:
(1)A' (2)B' (3)A'∪B' (4)A'∩B'
A.1,2,0
B.1,2,1
C.1,2,2
D.1,2,3
A.*((*ptr+1)[2])
B.*(*(p+5))
C.*((*ptr+1)+4)
D.*(*(p+1)+2)
A.modem man is larger
B.modern man is smaller
C.modern man is less brutal-looking
D.Pithecanthropus Number l’s brain size was more than an Australopithecine's
以下程序的运行结果为【 】。 include <stdio.h> main() { static int b[2][3]={{1,2,3},{4,5,6}}; static int *pb[]={b[0],b[1]}; int i,j; i=0; for (j=0;j<3;j++) printf("b[%d][%d]=%d ",i,j,*(pb[i]+j)); printf("\n"); }
设int a=1,b=2,c=4;
经过表达式(c=a!=b)&&(a==b)&&(c=b)运算后,a、b和C的值分别是()
A.1,2,0
B.1,2,1
C.1,2,2
C.1,2,3