sets:num:a,v,t,x,y;endsetsdata:num =1..4;y2=760;vc=1.5;enddatamin=m;m=ma+mb;mb=@sum(num(i):t(i));x2=(vc*@cos(aq)+2.28)*ma;y2=(vc*@sin(aq))*ma;@for(num(i):v(i)=2.28/4*i);@for(num(i):y(i)=2.28/4)@for(num(i):x(i)=(vc*@cos(a(i))+v(i))*t(i));@for(num(i):y

sets:num:a,v,t,x,y;endsetsdata:num =1..4;y2=760;vc=1.5;enddatamin=m;m=ma+mb;mb=@sum(num(i):t(i));x2=(vc*@cos(aq)+2.28)*ma;y2=(vc*@sin(aq))*ma;@for(num(i):v(i)=2.28/4*i);@for(num(i):y(i)=2.28/4)@for(num(i):x(i)=(vc*@cos(a(i))+v(i))*t(i));@for(num(i):y lingo程序：model：sets：product/1..3/:a,b; row/1..5/:c,d,y; num/1..9/:x; endsets其中的product和num该怎么用?还有平时不是用的col么而不是num区别在哪? 大量的left join 怎么优化select a.id,a.num,b.num,b.pcs,c.num,c.pcs,d.num,d.pcs,e.num,e.pcs,a.x,a.y from a left join b.id=a.id and b.time=a.timeleft join c.id=a.id and b.time=a.timeleft join d.id=a.id and b.time=a.timeleft join e.id=a.id and b.t LINGO请问这段程式错误 @@model:sets:A:i;B/PD1..PD6/:j;C(A,B)/1,X 1,Z 2,Y 3,X/:; C(A,B):; S/s1..s7/:k;time/t1..t12/:t;D(S,time):;E(A,S):;link(C,S,time):fit,match;endsetsdata:A = @OLE('fit_stut.xls','pro30 ') ;C = @OLE('fit_stut.xls','pg30');fit 拼单词,e,i,v,t,w,e,t,f,f,i,e,e,n,i,r,t,t,h,e,e,n,e,t,w,n,y,t,i,r,a,b,b,t, 用所给字母组合单词.s e t a e r s w s x t i y h d u n用所给字母组合单词.s e t a e r s w s x t i y h d u n e r d e p e s v e x n i r o a n e g r c s f a 组词并写出其汉语意思：1,g a r n y 2,x i e t c d e 3,r d o e b 4,r i t d e还有5，s t i v i a h t c w e l a c n a b c d e f g h i j k l m n o p q r s t u v w x y z是什么... a b c d e f g h i j k l m n o p q r s t u v w x y A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A B C D E F G H I J K L M N O P Q R S T V W X Y Z (打一句英文话) A B C D E F G H I J K L M N O P Q R S T U V W X Y Z小写是什么 I a m L o v e i n w i h t y ou 在L、H、I、E、A、G、V、Y、H、T里找出形容词 I h a v e b e e n a l w a y S w i t h y o u S E V E N+T H R E E+T Y O=T Y E L V E 一个字母代表一个数字, Matlab里 y=[y,C*x];这句代码是什么意思?r=20.4;numo=[1.875e6 1.562e6];deno=[1 54 204 213 64];numh=0.002;denh=1;[num,den]=feedback(numo,deno,numh,denh);[A,B,C,D]=tf2ss(num,den);Tf=5; h=0.02;x=[zeros(length(A),1)];y=0;t=0;for i=1:Tf/hK1=A*x+B*r 从下表中找出十个衣服类单词m s h i r t v s z od a s l i p p e r ss r n y w q z i q da j e r s k i r t on a a s w e a t e rd c k i s o c k s ba k e n x t d z o jl e r x e b k o i ts t s b r v t h l un l c y i s k u c p 已知；1,shirt 2,