In[6]:=Sort[{K,g,U,v,1,2,V}Out[6]=
A: {1,2,g,K,U,v,V}
B: {g,K,U,v,V,1,2}
C: {1,2,g,v,K,U,V}
D: {V,v,U,K,g,2,1}
A: {1,2,g,K,U,v,V}
B: {g,K,U,v,V,1,2}
C: {1,2,g,v,K,U,V}
D: {V,v,U,K,g,2,1}
举一反三
- 画出下列扇形区域。[img=541x528]18030733b119884.png[/img] A: ParametricPlot[{v Cos[u],v Sin[u]},{u,0,3Pi/2},{v,1/2,1}] B: ParametricPlot[{v Cos[u],v Sin[u]},{v,1/2,1},{u,0,3Pi/2}] C: ParametricPlot[{v Cos[u],v Sin[u]},{u,-Pi/2,0},{v,1/2,1}] D: ParametricPlot[{v Cos[u],v Sin[u]},{v,1/2,1},{u,-Pi/2,0}]
- 已知反应:2NO(g)+Br(g)=2NOBr(g)的反应历程是(1)NO(g)+Br2(g)=NOBr2(g)快(2)NOBr2(g)+NO(g)=2NOBr(g)慢则反应的速率方程应为:() A: V=k[NO] B: V=k[NOBr2][NO] C: V=k[NO]2[Br2] D: V=k[NO][Br2]
- 实验命令“fsurf(@(u,v)2*u*sin(v),@(u,v)3*u*cos(v),@(u,v)u^2,[0,5,0,2*pi]), hold on, fsurf(@(u,v)0,3*u*cos(v),@(u,v)u^2,[0,5,0,2*pi])”的结果是【 】
- 已知反应:2NO(g)+Br(g)=2NOBr(g)的反应历程是 (1)NO(g)+Br2(g)=NOBr2(g)快 (2)NOBr2(g)+NO(g)=2NOBr(g)慢 则反应的速率方程应为:() A: V=k[NO] B: V=k[NOBr][NO] C: V=k[NO][Br] D: V=k[NO][Br]
- $u$, $v\in E^3$, $u=(0,-1,1),v=(1,-1,-1)$. What is $||u \times v||^2$:<br/>______