可复性牙髓炎
A．阵发性自发痛B．冷刺激一过性痛C．机械刺激痛D．甜酸刺激痛E．热刺激迟缓痛 下列疾病的疼痛特点
参考答案：B
— Where are you?
— We are _____________ the train station.[ ]
A. into
B. at
C. above
信用证和托收项下的汇票抬头一般做成( )。
A．to Bearer
B．pay to xxx only
C．pay to the order of xxx
D．open
