客户信用证券账户不得买入或转入，除担保物和交易所规定标的证券范围以外的证券，不得用于从事交易所债券回购交易。( )
参考答案：对
twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city．
A．Examining
B．Examined
C．Being examined
D．Having been examined
使用电动工具时，电动机一旦启动，即可进行作业。
