在电源电压相同时,三相对称负载做三角形连接时的线电流IΔ与做星形连接时的线电流[br][/br]IY之比为______,功率之比PΔ/PY=______。 A: IΔ/IY=1/3 ,PΔ/PY=1/3 B: IΔ/IY=3,PΔ/ PY =3 C: IΔ/IY=3,PΔ/ PY =1/3 D: IΔ=IY,PΔ= PY<br>B
在电源电压相同时,三相对称负载做三角形连接时的线电流IΔ与做星形连接时的线电流[br][/br]IY之比为______,功率之比PΔ/PY=______。 A: IΔ/IY=1/3 ,PΔ/PY=1/3 B: IΔ/IY=3,PΔ/ PY =3 C: IΔ/IY=3,PΔ/ PY =1/3 D: IΔ=IY,PΔ= PY<br>B
设iX=2,iY=3, ch='a',则表达式iZ = (iX || iY)&&(ch>'A')的值是1
设iX=2,iY=3, ch='a',则表达式iZ = (iX || iY)&&(ch>'A')的值是1
下面程序的运行结果是 iX=80,iY=25____。void main(){ int iX,iY;iX=80;iY=25;printf("iX=%d,iY=%d\n",iX,iY);printf("iX/iY=%d,iX%iY=%d\n",iX/iY,iX%iY);}
下面程序的运行结果是 iX=80,iY=25____。void main(){ int iX,iY;iX=80;iY=25;printf("iX=%d,iY=%d\n",iX,iY);printf("iX/iY=%d,iX%iY=%d\n",iX/iY,iX%iY);}
iX=2,iY=3,ch='a',表达式iZ=(iX||iY)&&(ch>'A')的值是。 A: true B: false C: 0 D: 1
iX=2,iY=3,ch='a',表达式iZ=(iX||iY)&&(ch>'A')的值是。 A: true B: false C: 0 D: 1
void main() { int iX,iY,iM,iN; iX=10;iY=20; iM=iX++;iN=++iY; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); iM=iX– –;iN=– –iY; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); }
void main() { int iX,iY,iM,iN; iX=10;iY=20; iM=iX++;iN=++iY; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); iM=iX– –;iN=– –iY; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); }
iX=2,iY=3,ch='a',表达式iZ=(iX||iY)&&(ch>;'A')的值是 A: true B: false C: 0 D: 1
iX=2,iY=3,ch='a',表达式iZ=(iX||iY)&&(ch>;'A')的值是 A: true B: false C: 0 D: 1
#include "stdio.h" void main() { int iX,iY,iM,iN; iX=10;iY=20; iM=iX++;iN=iY++; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); iM=iX--;iN=--iY; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); }
#include "stdio.h" void main() { int iX,iY,iM,iN; iX=10;iY=20; iM=iX++;iN=iY++; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); iM=iX--;iN=--iY; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); }
“它黑黝黝地我在那里,牛似的模样。”中“黑黝黝”读 A: hēiyǒuyǒu B: hēiyōuyōu C: hēiyǒuyǒu和hēiyōuyōu都可以
“它黑黝黝地我在那里,牛似的模样。”中“黑黝黝”读 A: hēiyǒuyǒu B: hēiyōuyōu C: hēiyǒuyǒu和hēiyōuyōu都可以
图示正方形对x,y轴的惯性矩阵和惯性积分别为Ix,Iy和Ixy,下列结论中哪些是正确的?( ) (1)Ix=Iy; (2)Ix’=Iy’; (3)Ix=Ix’; (4)Ixy=Ix’y’http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/06df735ae8734b3f995cf9274f091650.png
图示正方形对x,y轴的惯性矩阵和惯性积分别为Ix,Iy和Ixy,下列结论中哪些是正确的?( ) (1)Ix=Iy; (2)Ix’=Iy’; (3)Ix=Ix’; (4)Ixy=Ix’y’http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/06df735ae8734b3f995cf9274f091650.png
图示半圆形对y、z轴的静矩和惯性矩的关系为() [img=163x162]17e0ad89b503aad.jpg[/img] A: Sy =Sz,Iy ≠Iz B: Sy =Sz,Iy =Iz C: Sy ≠Sz,Iy ≠Iz D: Sy ≠Sz,Iy =Iz
图示半圆形对y、z轴的静矩和惯性矩的关系为() [img=163x162]17e0ad89b503aad.jpg[/img] A: Sy =Sz,Iy ≠Iz B: Sy =Sz,Iy =Iz C: Sy ≠Sz,Iy ≠Iz D: Sy ≠Sz,Iy =Iz