function (wcb) {
db.ExamDefine.findOne({_id: examDefineID}, function (e, d) {
wcb(null, d.Items);
});
},
function (pids, completeExamIDs, wcb) {
db.ExamDefine.find({_id: {$nin: completeExamIDs}, 'Plan.Value': {$in: pids}}, {Name: 1}).toArray(wcb);
}