xg:(ref(c,20)-ref(c,21))/ref(c,21)>=0.0998 and (ref(c,21)-ref(c,22))/ref(c,22)>=0.0998 and (ref(c,22)-ref(c,23))/ref(c,23)>=0.0998 ang v<=llv(v,3) and c>o and (c-o)/o<0.0012;未经过测试，请自行测试。
