 #include<iostream> using namespace std;   int main(){     int n;     double x[4],y[4];     cin>>n;     for(;n--;){         for(int i=0;i<4;i++){             cin>>x[i];             cin>>y[i];         }         if((x[0]-x[1])*(y[2]-y[3])==(x[2]-x[3])*(y[0]-y[1])){             cout<<"YES"<<endl;         }else{             cout<<"NO"<<endl;         }     }     return 0; }  