在下列人物中最先称帝和没有称帝的是
①刘备②孙权③曹操④曹丕[ ]
A．④①
B．④③
C．③②
D．③①
答案：B
The introduction of containers in transport greatly ______ carriage of goods.
A．facilitate
B．speeds
C．facilitates
D．economizes
老年人可能会有肝性脑病( )
A．马兜铃酸B．普萘洛尔C．利多卡因D．华法林E．地高辛
