将核废水排入海
A. dump nuclear wastewater into the sea
B. pour nuclear wastewater into the sea
C. discharge nuclear water into the sea
就各种安全处置方法进行深入研究
A. further conduct in-depth research on various safe disposal methods
B. further conduct in-deep research on various safe disposal methods
C. further conduct in-depth research on various safe dispose methods
使用D/P、D/A和L/C三种结算方式，对于卖方而言，风险由大到小依次为（）
A. D/A.D/P和L/C
B. L/C.D/P和D/A
C. D/P、D/A和L/C
D.D/A.L/C和D/P
持票人将汇票提交付款人要求承兑的行为是。（）
A. 转让
B. 出票
C. 见票
D. 提示
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