比较各种筹资方案，其中利率最优惠的筹资方案是（）
A.银行信贷
B.股票筹资
C.债券筹资
D.财政筹资标
参考答案：D
It has been announced that all the students ______ put on the masks before going to school in case they are infected with SARS virus.
A．shall
B．will
C．need
D．may
灯
