title: letters of credit r**k analys** document reviewprofessional: international economic and tradethe instructorabstract: in recent years as china's foreign trade and exports of further accelera...
a:=between(close,3,8);b:=finance(55)>1;eps:=(finance(33)-ref(finance(33),1))/(finance(33),1)>1;tcst:=if(inblock('st板块'),1,0)=0;xuangu:a and b and eps and tcst;已经通过测试。