鼻咽癌的初诊症候主要有()
A.吸鼻后痰中带血
B.耳鸣、听力下降
C.鼻塞、头痛、患侧面部麻木
D.颈部肿块
E.上睑下垂、眼球外展受限
参考答案:A, B, C, D, E
下面几项中不是二手船交易方式的是()。
A.公开市场交易
B.拍卖
C.招标
D.信用证
In the foreign trade business, the payment is always made by L/C.In this sentence, L/C is the abbreviation for ______.
A.bill of Lading B.commercial InvoiceC.buying Contract D.letter of Credit