外伤后主要症状表现为再昏迷和瘫痪进行性的加重，首先考虑（）。
A.脑震荡
B.脑挫裂伤
C.颅内血肿
D.脑干损伤
E.头皮损伤
参考答案：C
根据开证行授权，买入受益人开立和提交的与信用证相符的单据的银行称为（）。
A、保兑行
B、议付行
C、偿付行
D、托收行
You are about to cross a narrow channel when you see an approaching vessel that can only be navigated safely within the channel.You should（）.
A.cross the channel as you are the stand-on vessel
B.cross only if the vessel in the channel is approaching on your port side
C.not cross the channel if you might impede the other vessel
D.sound the danger signal
