成员的完整列表，这些成员属于 CThostFtdcQryBrokerTradingParamsField,包括所有继承而来的类成员

BrokerID	CThostFtdcQryBrokerTradingParamsField
CurrencyID	CThostFtdcQryBrokerTradingParamsField
InvestorID	CThostFtdcQryBrokerTradingParamsField