临床上通常把从口腔到十二指肠的一段,称为()。
参考答案:上消化道
An accident ________ on Zhongshan Road yesterday afternoon.
A.has been happened
B.was happened
C.is happened
D.happened
货币市场工具往往被当做( )的替代品。
A.基金
B.债券
C.股票
D.现金